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4.9

Rated 4.9 out of 5 stars

4.9 Stars (190 Reviews)

","okendoReviewsSnippet",{"_438":2957},"

4.9

Rated 4.9 out of 5 stars

Based on 190 reviews

Rated out of 5 stars

178

Total 5 star reviews: 178

Rated out of 5 stars

Total 4 star reviews: 9

Rated out of 5 stars

Total 3 star reviews: 1

Rated out of 5 stars

Total 2 star reviews: 0

Rated out of 5 stars

Total 1 star reviews: 2

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190 reviews

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K
Kelly
I recommend this product
Rated 5 out of 5 stars
4 minutes ago
5 Stars
Best AC i have ever purchased. Whisper quiet!
Was this helpful?
SR
Skye Roca
I recommend this product
Rated 5 out of 5 stars
4 weeks ago
5 Stars
Love it! Super quiet. So recommended.
Was this helpful?
DL
diego l.
Verified Buyer
I recommend this product
Rated 5 out of 5 stars
4 months ago
Must have fan
Living in Texas, everyone knows summers get hot and energy bills get higher. In an effort to reduce costs I bought this personal fan since I sometimes work at home and wanted to cool air directed toward me while working. I also like turning it on via the app when I’m not there sometimes to circulate the stale air and turn on it’s perfect match of my scent diffuser to get my apt smelling and feeling more inviting upon arriving back home, especially if I’m not arriving alone.
Was this helpful?
CC
Coral C.
Verified Buyer
I recommend this product
Rated 5 out of 5 stars
4 months ago
very helpful company
🌟🌟🌟🌟🌟🌟
Was this helpful?
RH
Rob H.
Verified Buyer
I recommend this product
Rated 5 out of 5 stars
4 months ago
Windmill air conditioner
Great unit. Quite adjustable and easy to install and uninstall for the winter.
Was this helpful?

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Indoor air quality has become a critical concern for homeowners seeking to create healthier living environments. With airborne particles, volatile organic compounds, and pet dander affecting the air we breathe daily, choosing the right air purifier can significantly impact your family's health and comfort. Two brands have emerged as popular choices in the clean air market: Levoit and Windmill.

Both companies offer high-quality air purifiers with true HEPA filters, but they take different approaches to air cleaning technology, design, and user experience. Understanding these differences helps you select the best air purifier for your specific needs, whether you're dealing with allergies, pet odors, or simply want to maintain optimal air quality in your living space.

Levoit Air Purifier Technology and Performance

Levoit has established itself as a reliable name in air purification, offering premium models designed to address various indoor air quality challenges. Their higher-end air purifiers focus on proven filtration technology combined with smart features that compete directly with other premium air cleaning solutions.

Core Filtration System

Levoit's premium air purifiers feature a comprehensive three-stage filtration process that captures different types of airborne contaminants. The system begins with a pre-filter that captures larger particles like hair and dust, followed by a true HEPA filter that removes 99.97% of particles as small as 0.3 microns, including dust mites, pollen, and smoke particles.

The final stage incorporates an activated carbon filter designed to absorb odors, gases, and volatile organic compounds that can affect indoor air quality. This combination provides comprehensive air cleaning capabilities for the most common household air quality concerns.

Premium Model Features and Coverage

Levoit's premium air purifiers offer substantial clean air delivery rates (CADR) designed for large room coverage, typically handling spaces from 400 to over 900 square feet. These models compete directly with other high-performance air purifiers in terms of room coverage and filtration capacity.

Smart Features and Controls

Levoit's premium models include comprehensive smart features like internal air quality sensors, remote control operation, and mobile app connectivity through their VeSync platform. The air quality monitor provides real-time feedback on current air quality levels, while auto mode automatically adjusts fan speed based on detected pollution levels.

Energy Efficiency Focus: Levoit emphasizes energy efficient operation across their premium lineup, with models designed for continuous operation without excessive power consumption.

Windmill Air Purifier Innovation and Design

Windmill approaches air purification with a focus on combining medical-grade performance with thoughtful design that enhances rather than detracts from your living space. Their air purifiers represent a premium approach to clean air technology that prioritizes both effectiveness and aesthetics.

Advanced Filtration Technology

The Windmill air purifier features a sophisticated 3-in-1 medical-grade HEPA filter system that captures 99.97% of harmful particles, including bacteria, viruses, mold, pollen, and dust mites. Beyond basic particle filtration, the system includes an activated carbon layer specifically designed to remove smoke, odors, and volatile organic compounds that affect indoor air quality.

Design Philosophy

Unlike traditional air purifiers that prioritize function over form, Windmill creates units that serve as attractive home technology pieces. Available in real bamboo, sleek white, and bold navy finishes, these purifiers are designed to complement modern home aesthetics rather than hide in corners.

Laser Precision Monitoring

The Windmill air purifier incorporates laser precision air quality monitoring that provides real-time air quality index (AQI) readings and PM2.5 measurements. This advanced air quality sensor technology offers more detailed ambient air quality tracking compared to basic pollution sensors found in most air purifiers.

Ultra-Quiet Operation

Starting at just 16 dB on the lowest setting, the Windmill air purifier operates extremely quietly, making it suitable for bedrooms and other noise-sensitive environments. The unit features dual sleep modes and child lock functionality for enhanced user convenience.

Smart Home Integration: Comprehensive app connectivity allows users to monitor air quality, schedule operations, and track filter life remotely, with automation features that adapt to usage patterns over time.

Air Quality Monitoring and Sensor Technology

Modern air purifiers go beyond basic filtration to include sophisticated air quality monitoring systems that help users understand and optimize their indoor environment. The approach to air quality sensing represents a key differentiator between Levoit and Windmill units.

Levoit Air Quality Detection

Levoit air purifiers with smart features include internal air quality sensors that detect general pollution levels and adjust fan speed accordingly. Their air quality indicator typically uses colored lights to show current air quality status, providing basic feedback on ambient air quality conditions.

The sensors in Levoit units focus on detecting common airborne particles and adjusting operation to maintain good air quality. Auto mode functionality allows the purifier to increase fan speed when poor air quality is detected and reduce operation when the air is clean.

Windmill Advanced Monitoring

Windmill takes air quality monitoring further with laser precision sensors that provide detailed, real-time measurements of air quality index and PM2.5 particle concentrations. Users can view specific numerical readings rather than just general quality indicators, allowing for more precise monitoring of air cleaning progress.

The system tracks air quality over time, providing insights into pollution patterns and filter effectiveness. This detailed monitoring capability helps users understand how their indoor air quality changes throughout the day and in response to various activities.

Best Air Purifier Features for Different Needs

Selecting the best air purifier requires matching features to your specific air quality challenges and lifestyle preferences. Both Levoit and Windmill offer compelling features, but they excel in different areas that may appeal to different user priorities.

Essential Filtration Performance

Both brands provide true HEPA filtration that meets medical standards for particle removal. However, the implementation and additional features vary significantly between the two approaches.

Levoit Advantages:

✓ Proven three-stage filtration with reliable performance

✓ Wide range of models for different room sizes and budgets

✓ Energy efficient operation with low ongoing costs

✓ Straightforward controls and dependable auto mode functionality

Windmill Advantages:

✓ Medical-grade filtration with enhanced particle capture

✓ Advanced air quality monitoring with precise measurements

✓ Ultra-quiet operation suitable for any room environment

✓ Premium design aesthetics that enhance home decor

Smart Features and Automation

Smart air purifiers offer enhanced convenience and optimization capabilities that can improve both user experience and air cleaning effectiveness.

Levoit smart features focus on essential functionality like remote control, basic scheduling, and auto mode operation based on general air quality detection. Their approach emphasizes reliability and ease of use without overwhelming users with complex options.

Windmill provides more sophisticated automation with adaptive learning capabilities, detailed air quality analytics, and comprehensive smart home integration. The system can learn usage patterns and optimize operation for both air quality and energy efficiency over time.

Air Quality Sensor Accuracy and Response

The effectiveness of air quality sensors directly impacts how well an air purifier responds to changing conditions and maintains optimal indoor air quality throughout the day.

Sensor Technology Comparison

Levoit air quality sensors provide adequate detection of general pollution levels and respond appropriately to changes in air quality. Their sensors work well for basic auto mode functionality and provide sufficient feedback for most users' needs.

Windmill incorporates more advanced laser precision sensors that offer greater accuracy and faster response times to air quality changes. This enhanced sensitivity allows for more precise operation and better optimization of filter life and energy consumption.

Real-World Performance Impact

The difference in sensor accuracy becomes apparent in real-world use, particularly in environments with variable air quality conditions. More precise sensors can detect subtle changes in air quality and adjust operation accordingly, potentially providing better air cleaning results and more efficient operation.

Alternative Options

Many air purifiers on the market take a basic approach to cleaning the air. They typically rely on a single filtration method and stop short of offering deeper insights into the actual quality of the air in your home. While these units can capture some dust, pollen, and larger particles, they often lack the advanced monitoring, layered filtration, and smart controls that make a meaningful difference in air quality.

Air Quality Indicator Systems and User Feedback

Understanding current air quality conditions helps users make informed decisions about air purifier operation and assess the effectiveness of their air cleaning efforts.

Visual Feedback Systems

Levoit uses colored light indicators to show general air quality status, with different colors representing various pollution levels. This simple system provides clear, at-a-glance feedback that most users find intuitive and helpful.

Windmill provides both visual indicators and detailed numerical readings through their app interface. Users can access specific air quality index numbers, PM2.5 concentrations, and historical trends that offer deeper insights into their indoor air environment.

Practical Benefits of Detailed Monitoring

Advanced air quality indicators help users understand the relationship between activities and air quality, identify pollution sources, and track improvement over time. This information can be particularly valuable for users with allergies or respiratory sensitivities who need to maintain optimal air quality conditions.

Auto Mode Performance and Smart Operation

Auto mode functionality allows air purifiers to operate independently while maintaining optimal air quality, but the sophistication of these systems varies significantly between brands.

Levoit Auto Mode Operation

Levoit auto mode provides reliable automatic operation based on detected air quality levels. The system adjusts fan speed appropriately and returns to lower settings when air quality improves, providing good balance between air cleaning and energy efficiency.

Windmill Adaptive Automation

Windmill auto mode incorporates learning algorithms that adapt to usage patterns and room characteristics over time. The system can anticipate air quality needs based on historical data and optimize operation for both effectiveness and efficiency.

The adaptive capability means the air purifier becomes more effective over time as it learns your specific environment and usage patterns, potentially providing better long-term performance than static auto mode systems.

Activated Carbon Filtration and Odor Control

Beyond particle removal, effective odor control requires sophisticated activated carbon filtration that can address various types of gaseous pollutants and volatile organic compounds.

Carbon Filter Implementation

Both Levoit and Windmill include activated carbon filtration, but the quality and quantity of carbon material affects overall performance. Higher-quality carbon filters provide better odor removal and longer-lasting effectiveness before requiring replacement.

Levoit carbon filters focus on basic odor absorption for common household smells like cooking odors and pet-related scents. Their implementation provides adequate performance for most typical air quality challenges.

Windmill incorporates more advanced activated carbon technology designed to address a both every day odors and a broader range of volatile organic compounds and chemical pollutants. This approach can be particularly beneficial in environments with more complex air quality challenges.

Air Cleaning Performance and Room Coverage

The effectiveness of air cleaning depends on both filtration quality and the air purifier's ability to circulate air effectively throughout the intended space.

Clean Air Delivery Rate Considerations

CADR ratings provide standardized measurements of air cleaning performance for different types of particles. Both Levoit and Windmill offer models with good CADR ratings, but the real-world performance can vary based on room layout and air circulation patterns.

Proper sizing ensures optimal performance – an undersized unit will struggle to maintain good air quality, while an oversized unit may waste energy. Both brands provide sizing guidance, but Windmill's more precise air quality monitoring can help optimize operation for specific room conditions.

Air Distribution and Circulation

Effective air purification requires good air circulation throughout the room to ensure all air passes through the filtration system. The design of air intake and output affects how well the purifier can process air in different room configurations.

Best Overall Air Purifier Choice

Determining the best overall air purifier requires weighing performance, features, design, and value to find the option that best meets your specific needs and preferences.

Levoit Value Proposition

Levoit positions itself as a budget-friendly choice for air purification. Its models typically rely on standard three-stage filtration and a set of basic smart features that cover the essentials. While this makes Levoit a reasonable option for those who simply want straightforward air cleaning, the experience is limited compared to more advanced systems.

Choose Levoit if you want:

\n
Entry-level purification with standard three-stage filters
\n
\n
Basic app controls and scheduling functions
\n
\n
A no-frills approach to air quality detection and auto modes
\n
\n
Lower upfront cost over long-term performance and insights
\n

Windmill Premium Experience

Windmill appeals to users who want the most advanced air purification technology combined with premium design aesthetics and comprehensive smart features. Their approach justifies higher pricing through superior monitoring, adaptive operation, and exceptional build quality.

Choose Windmill if you value:

\n
Medical-grade filtration with advanced monitoring
\n
\n
Premium design that enhances home aesthetics
\n
\n
Ultra-quiet operation for any environment
\n
\n
Comprehensive smart features and automation
\n
\n
Detailed air quality insights and control
\n

Making Your Decision

Consider your priorities: Do you want reliable premium air cleaning with proven technology, or do you prefer cutting-edge innovation with medical-grade performance? Both options operate in the premium market segment, but Windmill's advanced monitoring, adaptive technology, and superior design justify its position at the top of the premium category. Your specific air quality needs, aesthetic preferences, and desired level of technological sophistication will influence which option provides better overall value for your situation.

About Windmill Air Purifier Excellence

Windmill has redefined expectations for home air purification by treating these devices as essential health technology rather than basic appliances. Their commitment to combining medical-grade performance with thoughtful design has created air purifiers that compete with commercial-grade systems while maintaining the convenience of home use.

What sets Windmill apart:

\n
Medical-grade HEPA filtration capturing 99.97% of particles 0.3 microns and larger
\n
\n
Laser precision air quality monitoring with real-time AQI and PM2.5 measurements
\n
\n
Ultra-quiet operation starting at 16 dB for undisturbed comfort
\n
\n
Premium design options including real bamboo and modern finishes
\n
\n
Adaptive smart technology that learns and optimizes for your environment
\n
\n
Comprehensive app control with scheduling, automation, and analytics
\n
\n
3rd party tested and verified with AHAM, Energy Star, and CARB certifications
\n
\n
Lifetime warranty demonstrating confidence in build quality
\n

Windmill air purifiers represent the evolution of home air cleaning toward comprehensive health technology that respects both your wellness needs and design preferences, making them an ideal choice for discerning users who refuse to compromise on air quality or aesthetics.

","publishedAt","2025-08-27T22:40:54Z",[],{"_88":4297,"_346":4298},"Levoit vs Windmill Air Purifier: Which One Is Right for Your Home?","Compare Levoit and Windmill air purifiers to find the best fit for your home. Discover features, pros, and cons to make an informed choice. Read more!","articles",{"_459":4301,"_4846":4847},[4302,4310,4326,4340,4356,4370,4384,4398,4412,4427,4441,4455,4472,4488,4502,4516,4531,4548,4564,4579,4592,4607,4621,4635,4649,4663,4677,4691,4705,4719,4730,4745,4759,4776,4790,4803,4819,4832],{"_4303":4304,"_462":4305},"cursor","eyJsYXN0X2lkIjo1NjMyMzMzNTc5ODYsImxhc3RfdmFsdWUiOjE3NTYzMzQ0NTQwMDAsIm9mZnNldCI6MH0=",{"_88":4280,"_32":4281,"_413":4282,"_4283":4306,"_61":4307,"_147":4308,"_4291":4292,"_4293":4294,"_450":4309},"Indoor air quality has become a critical concern for homeowners seeking to create healthier living environments. With airborne particles, volatile organic compounds, and pet dander affecting the ai...",{"_32":4286,"_73":4287,"_62":-5,"_75":4288,"_71":4289},{"_88":4274,"_413":4273},[],{"_4303":4311,"_462":4312},"eyJsYXN0X2lkIjo1NjMwNDc1NjM0MjYsImxhc3RfdmFsdWUiOjE3NTM4MzI3MjQwMDAsIm9mZnNldCI6MX0=",{"_88":4313,"_32":4314,"_413":4315,"_4283":4316,"_61":4317,"_147":4322,"_4291":4323,"_4293":4324,"_450":4325},"The Unexpected Benefits of Window AC Units","gid://shopify/Article/563047563426","the-unexpected-benefits-of-window-ac-units","When summer heat becomes unbearable, finding the right cooling solution can make all the difference in your comfort and energy bills. While many cooling options are available, window air conditioni...",{"_32":4318,"_73":4319,"_62":-5,"_75":4320,"_71":4321},"gid://shopify/ArticleImage/113537712290","https://cdn.shopify.com/s/files/1/0418/1796/4706/articles/Fresh_Windmill_AC.webp?v=1753832727",966,738,{"_88":4274,"_413":4273},"

When summer heat becomes unbearable, finding the right cooling solution can make all the difference in your comfort and energy bills. While many cooling options are available, window air conditioning units have proven to be a smart, efficient choice for both homeowners and renters. From significant cost savings to space-saving design, the benefits of window AC units extend far beyond just keeping you cool.

Why Window AC Units Are Game-Changers

Window air conditioner units offer a perfect balance of performance, efficiency, and convenience that makes them ideal for today's living situations. Unlike central air conditioning systems, a window unit provides targeted cooling exactly where you need it most. Whether you're cooling a single room, supplementing your existing HVAC system, or looking for an affordable alternative to central air, window AC units deliver reliable cooling.

The beauty of window air conditioning is its simplicity and effectiveness. Modern units like the Windmill AC combine sleek design with powerful performance, featuring dual air intake for faster cooling and antimicrobial-protected filtration that improves indoor air quality while keeping your space comfortable.

Central AC vs Window Units

When comparing central AC systems to window air conditioning units, the differences become clear quickly. Central air conditioning requires extensive ductwork, professional installation, and higher energy bills to cool your entire house. A central AC system also means you're locked into cooling the whole home at once, which often leads to wasting energy on unoccupied spaces.

Window AC units, on the other hand, give you complete control over your cooling needs. You can cool specific rooms when needed, adjust temperature settings independently, and avoid the massive initial cost of a central HVAC system. For apartments, dorm rooms, or homes where central air isn't practical, window units provide the same benefit of consistent cooling without the hefty investment.

Energy-Efficient Cooling That Actually Saves Money

One of the most compelling selling points of window AC units is their impressive energy efficiency. Modern energy-efficient models can significantly reduce power consumption compared to older cooling systems or oversized central air setups. When you cool only the spaces you're actually using, you naturally save energy and reduce those higher energy bills.

Energy-efficient window units are designed with advanced features that maximize cooling while minimizing electricity usage. Look for units with Energy Star certification to ensure you're meeting your energy-efficiency goals while staying comfortable. The key is proper installation and choosing the right size unit for your square footage.

AC Unit Design

Traditional portable air conditioner units take up valuable floor space and often require awkward venting solutions. Window air conditioning units solve this problem elegantly by utilizing your window frame instead of cluttering your living area. This space-saving design is particularly valuable in small spaces like apartments or dorm rooms where every square foot matters.

The compact nature of window AC units means you maintain your natural light and keep your floor space free for furniture, movement, and daily activities. Unlike bulky cooling systems that dominate a room, a well-designed window unit blends seamlessly into your space while delivering powerful cooling performance.

Air Conditioner Technology

Today's window air conditioner units offer much more than simple temperature control. Advanced models feature activated carbon filters that capture airborne particles, improving your indoor air quality while cooling your space. Some units even include heat pump functionality, providing both cooling and heating capabilities for year-round comfort.

Smart features like app/voice control and auto-dimming displays make modern window units incredibly user-friendly. You can adjust temperature settings remotely, schedule cooling cycles, and monitor energy usage from your smartphone. This technology transforms a simple air conditioner into a comprehensive climate control solution.

Central Air Alternatives: Flexible Cooling Solutions

Not everyone needs or wants the expense and complexity of central air. Window air conditioning units provide flexible cooling options that adapt to your specific situation. Whether you're renting and can't modify the HVAC system, need to cool multiple rooms independently, or want to supplement existing cooling, window units offer the perfect solution.

Multiple units can be strategically placed to create customized cooling zones throughout your home. This approach often proves more cost-effective than installing or upgrading central air, especially when you consider the installation process and ongoing maintenance requirements of larger systems.

Portable Air vs Window Units

While portable air conditioners might seem convenient, they typically use more electricity and provide less effective cooling than window units. Portable units also require floor space, create condensation issues, and often struggle with proper insulation due to their flexible exhaust hoses.

Window air conditioning units deliver superior performance with better energy efficiency and more consistent cooling. The permanent installation also means better sealing and insulation, which translates to lower energy consumption and more effective temperature control.

Low-Cost Cooling That Doesn't Compromise Quality

The affordability of window AC units makes them accessible to virtually anyone seeking relief from summer heat. The low cost extends beyond the initial purchase – these units are generally straightforward to install, require minimal professional installation, and have lower ongoing maintenance costs compared to complex central air systems.

Regular maintenance is simple and cost-effective, typically involving carbon filter cleaning/replacement and basic upkeep that most homeowners can handle themselves. This simplicity keeps your long-term costs low while ensuring reliable performance season after season.

Key Points for Choosing Your Window AC

When selecting a window air conditioning unit, consider your specific cooling needs, room size, and energy efficiency goals. Proper installation is crucial for optimal performance and energy savings, so don't hesitate to consult an HVAC professional if needed. Look for models with features that matter to you – whether that's smart connectivity, superior filtration, or ultra-quiet operation.

The many benefits of window AC units make them an excellent choice for most cooling applications. From their space-saving design to their energy-efficient operation, these units provide a perfect balance of performance, convenience, and affordability that's hard to beat.

With the right window AC unit, you can enjoy consistent cooling, improved indoor air quality, and lower energy bills all summer long, without the complexity and expense of more elaborate cooling systems.

Choose Windmill

The Windmill AC combines award-winning design with cutting-edge performance, proving that window units can be both powerful and beautiful. Unlike traditional ACs that prioritize function over form, Windmill units enhance your space while delivering exceptional cooling.

What makes Windmill different:

\n
Dual air intake for faster, more efficient cooling
\n
\n
45-degree airflow angle that mimics central air circulation
\n
\n
WhisperTech™ technology for ultra-quiet operation
\n
\n
Smart app and voice control for convenience anywhere
\n
\n
Auto-dimming LED displays for peaceful sleep
\n
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Antimicrobial-protected filtration for cleaner air
\n
\n
Double-sided insulation exceeding Energy Star requirements
\n
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Multiple BTU options (6K, 8K, 10K, 12K) for any room size
\n

Experience the difference of a window AC that's actually designed with you in mind – because staying cool shouldn't mean compromising on style, efficiency, or peace of mind.

Frequently Asked Questions

What are the benefits of a window AC?

Window AC units offer significant cost savings with lower initial costs and energy bills compared to central air conditioning, while providing targeted cooling exactly where you need it. They also save valuable floor space, are easy to install, and modern models feature smart controls, quiet operation, and air filtration for improved indoor air quality.

What are the disadvantages of a window AC?

Window AC units are designed for single-room cooling rather than whole-house applications, which means you may need multiple units for larger homes. Some older models can be noisier than central systems, though modern premium units have solved this with ultra-quiet technology.

Why is a window AC not preferred?

Window AC units are actually increasingly preferred due to their energy efficiency, lower costs, and flexibility compared to expensive central air systems. The perception stems from older, noisier models, but today's advanced window units offer smart features, quiet operation, and superior performance that rivals traditional cooling systems.

Is it okay to have a window AC on all the time?

Yes, modern energy-efficient window AC units are designed for continuous operation and can safely run all the time when properly maintained. Running your window AC consistently can actually be more energy-efficient than frequently turning it on and off, as the unit doesn't have to work as hard to reach your desired temperature.

","2025-07-29T23:45:24Z",[],{"_4303":4327,"_462":4328},"eyJsYXN0X2lkIjo1NjMwMTg1MzA5NzgsImxhc3RfdmFsdWUiOjE3NTM0MDI4MzQwMDAsIm9mZnNldCI6Mn0=",{"_88":4329,"_32":4330,"_413":4331,"_4283":4332,"_61":4333,"_147":4336,"_4291":4337,"_4293":4338,"_450":4339},"Window AC vs Portable AC: Choosing the Best Cooling Solution for You","gid://shopify/Article/563018530978","window-ac-vs-portable-ac-choosing-the-best-cooling-solution-for-you","When the heat hits, you need cooling that actually works. But standing in the air conditioner aisle (or scrolling through endless options online), the choice between a window air conditioner and a ...",{"_32":4334,"_73":4335,"_62":-5,"_75":448,"_71":445},"gid://shopify/ArticleImage/113476141218","https://cdn.shopify.com/s/files/1/0418/1796/4706/articles/AC_IMG_44b6b031-5d4b-4869-8c25-9a772cc4dae8.webp?v=1753403455",{"_88":4274,"_413":4273},"

When the heat hits, you need cooling that actually works. But standing in the air conditioner aisle (or scrolling through endless options online), the choice between a window air conditioner and a portable air conditioner can leave you wondering what's really best for your space.

Both cooling solutions promise relief from high temperatures, but they deliver that comfort in very different ways. Understanding how window AC units and portable AC units actually perform in your home can save you from making a choice you'll regret when the next heatwave rolls in.

Whether you're dealing with a tiny studio apartment or trying to cool multiple rooms without breaking the bank, the right air conditioner makes all the difference between staying comfortable and watching your electric bill soar.

Types of Air Conditioners: The Real Difference

Window air conditioners fit snugly into your window frame, becoming part of your room's cooling system. The genius is in the design: the back half sits outside, handling all the hot, noisy work, while the front delivers perfectly cool air without eating up your valuable floor space.

Portable air conditioners roll wherever you need them, which sounds pretty appealing until you realize they still need that exhaust hose snaking to a window. Most portable AC units end up in one spot anyway—they're just taking up room space while they're there.

Here's what really matters: both types remove heat and humidity, but how they do it affects everything from your comfort to your monthly energy costs.

Portable Air Conditioning: When Flexibility Matters

Portable AC units shine in specific situations, especially when permanent installation feels impossible or intimidating. If you're renting and can't modify anything, or if the thought of installing a window unit makes you feel nervous, portables offer an immediate solution.

Why People Love Portable Units:

\n
Plug and play: Unbox, plug in, and you're cooling in minutes
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Move when you move: Take it to different rooms or apartments
\n
\n
Zero window modifications: Perfect for strict landlords
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Store it away: Tuck it in a closet during cooler months
\n

The Reality Check:

\n
Space hogs: These units claim a significant chunk of your room
\n
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Still need window access: That exhaust hose isn't optional
\n
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Noise travels with you: The compressor runs right next to where you're trying to relax
\n
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Energy efficiency struggles: Physics works against portable designs
\n

Most portable ACs work best as temporary solutions (like when your central air stops working) or in small spaces where you genuinely need the mobility. Dual-hose models perform better than single-hose designs, but they're still fighting an uphill battle against their own limitations.

Window Air Conditioning: Efficient Cooling Done Right

Window AC units have solved most of the problems that made people hesitant about installation. Modern window air conditioners (especially those designed with user experience in mind) install more easily than most people expect.

Why Window Units Win:

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Cooling power: More BTUs where you need them, less waste where you don't
\n
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Energy efficiency: Better design means lower electric bills
\n
\n
Quiet operation: The noisy stuff stays outside where it belongs
\n
\n
Space-saving: Your floor space stays yours
\n
\n
Better value: More cooling per dollar, both upfront and long-term
\n

Installation Reality Check:

Gone are the days when installing a window AC meant calling in favors from friends with strong backs. Today's well-designed units come with comprehensive install kits and instructions that actually make sense. Some models can be installed by one person in under an hour, and if you'd rather have professional help, services like TaskRabbit make that simple too.

The key is choosing a unit that's designed for real people, not just engineers.

Key Considerations for Your Air Conditioning Choice

Cooling Capacity

The Department of Energy provides BTU guidelines, but here's the practical translation: window units typically cool more effectively per BTU because they're not fighting their own design. An 8,000 BTU window unit will outperform an 8,000 BTU portable unit in most real-world situations.

For small spaces under 250 square feet, either option can work. Beyond that, window units start showing their superiority in cooling power and efficiency.

Energy Efficiency and Your Electric Bill

Every month when that electric bill arrives, you'll appreciate choosing the more energy-efficient option. Window air conditioners achieve higher Combined Energy Efficiency Ratios (CEER) because they can actually expel heat effectively instead of fighting against themselves.

Look for Energy Star ratings and high CEER numbers, but remember that real-world efficiency depends on proper installation and sizing. A well-installed window unit will consistently save money compared to portable alternatives.

Installation Process: Easier Than You Think

Many people choose portable units specifically to avoid installation, but modern window AC installation has become surprisingly straightforward.

The best window units now include everything you need and clear, step-by-step instructions. Some even feature pre-built installation components that eliminate guesswork. Compare this to portable units, which still require setting up that exhaust hose system—you're not really avoiding installation, just changing what kind you're doing.

Noise Levels: Finding Your Quiet Cool

Nothing ruins relaxation like a noisy air conditioner. This is where window units have a fundamental advantage: all the loud mechanical components operate outside your living space.

Portable air conditioners keep everything inside, creating a constant background hum that ranges from \"noticeable\" to \"conversation-interrupting.\" Even quiet portable models struggle to compete with well-designed window units that use advanced noise reduction technology.

Look for units with decibel ratings, but remember that where the noise comes from matters as much as how loud it is.

Maintenance and Long-term Costs

Portable AC maintenance means regular filter cleaning, emptying condensate (if needed), and keeping that exhaust hose clear. Everything's accessible, but dust and debris accumulate quickly when all components stay indoors.

Window unit maintenance typically involves seasonal filter cleaning and removal for winter storage. Although more impressive units come with winter covers that don't require winter removal. The outdoor components benefit from natural cleaning through weather, while indoor components stay cleaner longer.

Factor in energy costs, filter replacements, and potential repairs when calculating true ownership costs. The more efficient unit usually wins in the long run.

Making the Right Choice for Your Space

Your ideal cooling solution depends on your specific situation, but here's how to think through it:

Consider a portable air conditioner when:

\n
You're definitely moving soon and want cooling now
\n
\n
Your windows won't accommodate any type of mounted unit
\n
\n
You genuinely need cooling in different rooms at different times
\n
\n
Choose a window air conditioner when:
\n

\n
You want effective, efficient cooling
\n
\n
You're tired of units that take up floor space
\n
\n
Quiet operation matters for sleep or concentration
\n
\n
You want better long-term value and performance
\n

The Future of Smart, Efficient Cooling

Air conditioning technology keeps improving, with energy efficiency and user experience at the forefront. Modern window air conditioners now offer smart controls, app connectivity, and installation designs that respect both your intelligence and your time.

The best units combine powerful cooling with thoughtful features like auto-dimming displays for better sleep and airflow patterns that distribute cool air more naturally throughout your space.

When you're choosing between portable and window air conditioning, you're really choosing between convenience and performance. The good news? Today's smartest window units deliver both, making installation so straightforward that the convenience gap has largely disappeared.

Whatever you choose, prioritize proper sizing, energy efficiency, and features that match how you actually live. After all, the best air conditioner is the one that keeps you comfortable without constant reminders that it's running.

About Windmill: Modern Air Care, Designed with You in Mind

At Windmill, we believe air conditioning shouldn't be complicated, ugly, or loud. That's why we've reimagined the window air conditioner from the ground up, creating the #1 easy-to-install AC that actually looks good in your home.

What Makes Windmill Different:

\n
Easy installation: Pre-built install kits mean one-person setup in under an hour
\n
\n
Ultra-quiet operation: WhisperTech™ technology keeps noise outside where it belongs
\n
\n
Smart controls: App and voice control let you adjust the climate from anywhere
\n
\n
Superior airflow: 45-degree cooling angle mimics central air distribution
\n
\n
Award-winning design: House Beautiful recognition for style that enhances your space
\n
\n
Professional support: TaskRabbit partnership offers $99 white-glove installation nationwide
\n

Our window AC units deliver powerful, efficient cooling without the typical hassles. Whether you choose our 6K BTU unit for smaller spaces or our 10K BTU WhisperTech™ model for larger rooms, you're getting modern air care that's as smart as it is stylish.

Because staying cool and comfortable should be effortless, not complicated.

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Nobody wants to think about replacing their air conditioner until it stops working on the hottest day of summer. But here's the thing: waiting until your window AC unit completely gives up isn't just uncomfortable, it's expensive. Whether you're dealing with skyrocketing energy bills or an air conditioning unit that's making loud, concerning noises, knowing when to replace your cooling system can save you money and headaches.

Understanding Your Air Conditioner's Life Expectancy

The average lifespan of a window air conditioning unit is 8-10 years. Here's what really matters: just because your AC unit is still running doesn't mean it's running efficiently. Older air conditioners work harder to deliver the same cooling, driving up your energy bills and wearing out components faster.

Think of it like this, you wouldn't keep driving a car that needs repairs every month just because it still technically runs. The same logic applies to your cooling system. Sometimes, replacement makes more sense than another summer season of crossing your fingers.

The Clear Signs It's Time to Replace Your Air Conditioner

Your Energy Bills Have Skyrocketed

If you've noticed your cooling costs creeping up year after year despite similar usage patterns, your air conditioner is likely losing energy efficiency. Older units can use up to 40% more energy than modern, energy-efficient models. When your energy bills start rivaling your car payment, it's time to do the math on replacement.

Frequent Repairs Are Draining Your Wallet

Here's a good rule of thumb: if repair costs exceed 50% of what a new air conditioner would cost, replacement is the smarter financial move. Those frequent repairs add up quickly, and each fix is just a temporary bandage on a system that's reaching the end of its useful life.

Your AC Unit Is Making Loud or Unusual Noises

A healthy air conditioner should hum along quietly in the background. Modern units operate at whisper-quiet levels, some as low as 42 decibels, quieter than a typical conversation. If yours sounds like it's auditioning for a heavy metal band—grinding, squealing, or banging—those aren't just annoying sounds. They're expensive problems waiting to happen. While some noises can be fixed, others signal major component failure that makes replacement the only sensible option.

Strange Smells Are Coming from Your Unit

If your air conditioning unit smells musty, burnt, or just \"off,\" don't ignore it. These odors often indicate mold growth, electrical issues, or other problems that can affect your health and safety. While cleaning might help with minor issues, persistent smells usually mean deeper problems. Modern units with antimicrobial-protected filters/activated carbon filters and advanced drainage systems help prevent these issues from developing in the first place.

The Magic Number: 10 Years

If your air conditioner is more than 10 years old, it's living on borrowed time. Even if it's still cooling, the efficiency loss alone often justifies replacement. Plus, older air conditioners use outdated refrigerant (R-22) that's being phased out due to environmental concerns, making repairs increasingly expensive.

The Hidden Costs of Keeping an Old Air Conditioner

Running an inefficient cooling system costs more than just high energy bills. Consider these factors:

Comfort Compromise: Older units struggle to maintain consistent temperatures, leaving some rooms too hot while others feel like a freezer. You end up constantly adjusting the thermostat, never quite comfortable. Modern units distribute air at optimal angles (like 45 degrees) for even cooling throughout your space.

Environmental Impact: Older air conditioners aren't just energy hogs, they're worse for the environment. Many use R-22 refrigerant, which damages the ozone layer. Newer models use eco-friendly refrigerants and consume less energy overall. Some innovative units even use their own condensation to boost cooling efficiency, eliminating wasteful drainage systems.

Health Concerns: As air conditioning units age, they become breeding grounds for mold and bacteria, especially if maintenance has been spotty. Poor air quality affects everything from sleep quality to respiratory health. Today's best units feature dual filtration systems with antimicrobial protection to keep your air cleaner.

Making the Decision: Repair or Replace?

The decision-making process doesn't have to be complicated. Ask yourself:

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How old is your unit? If it's approaching or past 10 years, lean toward replacement.
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What's your repair history? Multiple repairs in recent years signal it's time.
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How are your energy bills? If they're climbing despite normal use, efficiency is dropping.
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Is your home comfortable? If you're constantly adjusting settings or dealing with hot spots, your unit can't keep up.
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The Benefits of a New Air Conditioner

Modern air conditioning units aren't just more efficient, they're smarter, quieter, and better designed. Here's what you gain with a new unit:

Dramatic Energy Savings

New Energy Star certified models use up to 40% less energy than units from just 10 years ago. Some advanced models with features like WhisperTech™ technology can be 35% more efficient than even standard new units. With cooling costs making up a significant chunk of summer energy bills, those savings add up fast. Many homeowners see their investment pay for itself within a few years through reduced energy use alone.

Better Cooling Performance

New units cool faster and more evenly, eliminating those frustrating hot and cold spots. Advanced fan designs and improved components mean your space reaches the perfect temperature quickly and stays there. However, remember that during extreme heatwaves, even the best window units can only cool about 15-20 degrees below the outside temperature, that's just physics, not a flaw.

Smart Features That Make Sense

Today's air conditioners come with Wi-Fi connectivity, allowing you to control your cooling from anywhere. Forgot to turn off the AC when you left for work? No problem. Want to cool your space before you get home? Easy. The best apps even send maintenance reminders and track energy usage. Features like auto-dimming displays ensure your AC won't disturb your sleep. These aren't just fancy extras, they're practical tools that save money and improve comfort.

Quieter Operation

If your current unit sounds like a jet engine, you'll be amazed at how quiet modern air conditioners run. New sound-dampening technology and design innovations mean you can actually have a conversation or watch TV without cranking the volume. Look for units that specify their decibel levels—the quietest models operate below 45 dB.

Maximizing Your Current AC's Lifespan

Not ready to replace just yet? Proper maintenance can extend your air conditioner's life and improve its efficiency:

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Change or clean filters monthly during heavy use seasons
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Keep the unit clean and free of debris
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Ensure proper installation angle (about 1 degree tilt backward for drainage)
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Schedule annual tune-ups to catch small problems early
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Don't ignore warning signs like unusual noises or reduced cooling
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Remember, good maintenance can extend life expectancy, but it can't make an old, inefficient unit perform like a new one.

Planning Your Air Conditioner Replacement

The best time to replace your air conditioner isn't during a heat wave when you're desperate. Plan ahead:

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Shop in the off-season: You'll find better deals and have time to research options without pressure.
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Consider your cooling needs: Make sure your new unit is properly sized for your space. Bigger isn't always better—an oversized unit wastes energy and doesn't control humidity well. Modern units come in various sizes from 6,000 to 12,000 BTUs to match your specific needs.
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Look for rebates: Many utilities offer rebates for Energy Star models, and some states provide tax credits for efficient systems.
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Think long-term: A slightly more expensive, highly efficient model often saves money over its lifetime through lower operating costs.
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Consider installation: Look for units with a preassembled install kit, and clear instructions. Some manufacturers partner with national installation services for convenient, flat-rate installation.
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The Bottom Line: When Replacement Makes Sense

Your air conditioner is one of the hardest-working appliances in your home during summer. When it starts showing its age through higher bills, frequent repairs, or poor performance, replacement isn't just an option—it's the smart financial and practical choice.

If your air conditioning unit is approaching 10 years old, experiencing frequent issues, or driving up your energy costs, it's time to start shopping. Modern units offer better cooling, lower operating costs, and features that make your life easier.

Don't wait for complete failure on the hottest day of the year. Take control of your comfort and your budget by planning your replacement strategically. Your future self (and your wallet) will thank you when you're enjoying efficient, reliable cooling all summer long.

Why Choose Windmill for Your AC Replacement

When you're ready to replace your air conditioner, Windmill offers a refreshing approach to home cooling. Designed with modern homes in mind, Windmill ACs combine cutting-edge technology with thoughtful design to solve the common frustrations of window air conditioning.

What Sets Windmill Apart

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Innovative Drainage Technology: Unlike traditional units with drain holes that can clog, Windmill features a proprietary hot coil system that evaporates excess moisture. This means no more worrying about water damage or drainage issues. The system even uses condensation to cool the condenser coils, boosting efficiency.
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Effortless Installation: With pre-assembled accordion sides and clear instructions, Windmill units can be installed in about an hour—often by just one person, but you should always have someone there to help just in case. For those who prefer professional help, Windmill partners with TaskRabbit for nationwide installation at just $99.
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Whisper-Quiet Operation: Windmill's WhisperTech models (available in 8K, 10K, and 12K BTU) operate at just 42 decibels—quieter than a library. You'll forget it's even running.
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Smart Features That Work: The Windmill app consistently receives praise for actually working when you need it. Control your AC from anywhere, set schedules, monitor energy usage, and receive maintenance reminders. The auto-dimming LED display ensures peaceful sleep.
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Design You Won't Want to Hide: With rounded corners and a minimalist aesthetic, Windmill is the first window AC that actually looks good in your home. Available in multiple sizes from 6K to 12K BTUs to perfectly match your space.
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Built to Last: Dual filtration with antimicrobial-protected mesh keeps your air cleaner, while the durable construction means your Windmill can stay installed year-round—it's built to withstand the elements.
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Support When You Need It

With customer support available seven days a week at support@windmillair.com, help is always there when you need it. Whether you have questions about choosing the right size or need ac troubleshooting assistance, the Windmill team is ready to help.

Ready to experience the difference? Visit Windmill to explore how modern air conditioning should work—efficient, quiet, and actually enjoyable to use. Because staying cool shouldn't mean compromising on style, struggling with installation, or dealing with constant maintenance headaches.

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When summer heat starts creeping in, finding the perfect window air conditioner becomes priority number one. If you're comparing the Midea U-shaped design against the sleek Windmill AC, you've already narrowed it down to two of the smartest choices on the market. Both units bring innovative features to the table, from Wi-Fi connectivity to whisper-quiet operation. But which one deserves that prime spot in your window? Let's dive into everything you need to know.

Understanding Modern Window AC Units: More Than Just Cold Air

Gone are the days when a window air conditioner was just a clunky box that blasted cold air. Today's smart air conditioners pack serious technology into designs that actually complement your home. Both Midea and Windmill represent this new generation of window air conditioner, but they take different approaches to solving the same problems.

The modern air conditioning unit needs to do more than cool—it needs to operate efficiently, integrate with your smart home, and ideally, not sound like a freight train while doing it. That's where features like inverter technology, smart features, and thoughtful design come into play.

The Windmill AC: Where Style Meets Substance

Let's start with what makes the Windmill AC special. First impressions matter, and Windmill absolutely nails it with what might be the best-looking window air conditioner on the market. Those rounded corners and auto-dimming LED display aren't just for show—they represent a philosophy that your AC unit shouldn't be something you try to hide.

Installation That Actually Makes Sense

Here's where Windmill really shines: installation. While most window air conditioners turn installation day into a frustrating puzzle, Windmill arrives with pre-assembled accordion sides that fit right into your window. No complex brackets, no confusing adjustments—just ensure a 1-degree backward tilt for proper drainage. It has a straightforward setup that typically takes less than 45 minutes, but most users install this window AC in minutes, since everything is pre-assembled.

The double-insulating side panels slide into place easily, exceeding Energy Star insulation requirements by 2x. This creates a secure seal that keeps the AC's energy efficiency high and your energy usage low. For those with double hung windows (which, let's be honest, is most of us), the window ac installation process feels refreshingly simple. And if you prefer professional help, Windmill partners with TaskRabbit for nationwide installation at just $99.

Smart Features That Actually Help

The Windmill app is genuinely useful. With Wi-Fi connectivity built right in, you can control your unit from anywhere. Heading home early? Cool your space before you arrive. Forgot to turn it off? No problem. The app gives you complete control over:

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Temperature settings
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Fan speeds (3 options)
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Sleep mode scheduling with auto-dimming LEDs
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Energy usage monitoring - the first window AC with a build-in energy monitor
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Smart home integration with voice control
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Maintenance reminders for filter cleaning
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WhisperTech

Available on select models (8K, 10K, and 12K BTU), Windmill's WhisperTech technology keeps noise levels impressively low. At 42 dB on the low setting, it's quieter than a typical conversation. These WhisperTech models are also 35% more efficient than standard units. You can actually watch TV or have a phone call without cranking the volume. The inverter technology helps here too, allowing the compressor to adjust its speed rather than constantly cycling on and off.

The Midea U-Shaped Design: Innovation with Trade-offs

The Midea U takes a completely different approach with its U-shaped design. Yes, it's innovative. Yes, it allows for some window access. But innovation doesn't always mean better—it means different.

The Window Access Question

Midea's big selling point is that U-shaped cutout that theoretically lets you use your window while the AC is installed. In practice? It's complicated. You can crack the window open a bit, but you're not getting full window functionality. Plus, that unique design means a more complex installation process with separate mounting brackets that need careful adjustment.

Performance by the Numbers

The Midea U does deliver solid cooling performance. It can bring an 80-degree room down to 68 degrees in about 45 minutes, which is respectable for an 8,000 BTU unit and comparable to the Windmill AC. The inverter compressor helps maintain consistent temperatures once you hit your target, and the energy efficiency ratio of 15 means reasonable power consumption.

Head-to-Head: Windmill AC vs Midea in Real-World Use

Cooling Power and Efficiency

Both units offer 8,000 BTU options, perfect for spaces up to 350 square feet. However, Windmill provides more flexibility with models ranging from 6K to 12K BTUs. They both feature inverter technology and achieve similar efficiency ratings. The real difference comes down to how they deliver that cooling.

Windmill's approach focuses on efficient cooling distribution with a 45-degree airflow angle that ensures even temperature throughout your room. No hot spots, no overcooled corners—just consistent comfort. The energy star certified design means you're conserving energy without sacrificing performance. During extreme heatwaves, remember that window air conditioners can typically only cool 15-20 degrees below outside temperature—so if it's 100°F outside, maintaining 75-80°F inside is normal operation.

Noise Level Comparison

Both units perform similarly when it comes to noise. The WhisperTech models match Midea's noise levels. The difference is negligible, we're talking about the difference between a whisper and a slightly louder whisper. Both are dramatically quieter than traditional window units.

Smart Features Face-Off

Both window air conditioners offer:

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Wi-Fi connectivity
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Mobile app control
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Voice control compatibility
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Energy usage tracking
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Remote control included
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Where Windmill edges ahead is in the user experience. The Windmill app consistently receives praise for its intuitive interface and reliable connectivity. Set up your sleep mode, adjust fan speeds, or check your energy savings, it all just works. The auto-dimming LED display also ensures your AC won't keep you awake at night.

Installation: The Hidden Cost of Window AC Units

Let's be real about installation because it's often the deal breaker for window air conditioner purchases. Most units require two people, an hour of frustration, and possibly some choice words.

Windmill's Installation Advantage

The Windmill AC transforms what's typically a dreaded task into something manageable:

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Pre-assembled accordion sides eliminate guesswork
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Clear, visual instructions (with helpful video guides available)
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Double-insulating side panels that actually fit properly
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No special brackets or complicated adjustments
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Just remember the 1-degree backward tilt for drainage
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Midea's Installation Reality

The U-shaped design might seem clever, but it complicates installation:

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Requires separate mounting brackets
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Needs precise window measurements
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More adjustment points mean more potential problems
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The unique shape can be awkward to maneuver
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Definitely needs two people for safe installation
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Energy Efficiency: Saving Money While Staying Cool

Both units achieve impressive energy efficiency ratings, but efficiency goes beyond just the numbers. The combined energy efficiency ratio tells only part of the story.

Windmill's Drainage Innovation

Here's something unique: Windmill units feature a proprietary hot coil that evaporates excess moisture. This means no worrying about clogs or water damage. Even better, the system uses condensation to cool the condenser coils, boosting overall efficiency. On extremely humid days, any minimal dripping from the back is completely normal.

How Much Energy Really Matters

With both units sporting 15.0 energy efficiency ratings on comparable models, your energy bills will be similar. The real savings come from smart usage:

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Use eco mode during moderate temperatures
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Program sleep mode to reduce overnight usage
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Take advantage of fan-only settings when possible
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Let the inverter technology do its job by avoiding constant temperature changes
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Smart Home Integration: Living in the Future

Modern smart window air conditioners should play nice with your existing smart home setup. Both Windmill and Midea work with popular voice assistants, but the implementation matters.

Windmill's Seamless Integration

Set up is straightforward:

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Download the Windmill Air app
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Connect to your Wi-Fi
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Link to your preferred voice assistant
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Start using voice commands naturally
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\"Hey Google, set the bedroom to 72 degrees\" just works. No complicated routines, no frustrating delays.

Beyond Basic Control

Smart features should make your life easier:

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Energy reports to track usage patterns
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Maintenance reminders for filter cleaning
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Integration with other smart home devices
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Design and Aesthetics: Yes, Looks Matter

Your window AC unit is going to be visible every single day. Why settle for an eyesore?

Windmill's Design Philosophy

Windmill understands that the best window air conditioner should complement your space, not detract from it. The rounded corners, minimal branding, and subtle auto-dimming LED indicators create a premium look that works with modern interiors. It's the first window air conditioner that you might actually not mind having in your Instagram stories.

Advanced Filtration System

Beyond looks, Windmill includes:

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Antimicrobial-protected mesh filter for cleaner air
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Optional activated carbon filters for odor control
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Easy-access filter panel for simple maintenance
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Clear indicators when filters need attention
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Real-World Performance: What Actually Matters

Testing window air conditioners in labs is one thing. Living with them is another. Here's what daily use reveals:

Windmill in Daily Life

Users consistently report:

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Reliable app connectivity
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Consistent cooling without cold spots
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Quiet operation that doesn't disrupt sleep
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Easy filter maintenance
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Excellent customer support at support@windmillair.com (available 7 days a week)
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The Little Things That Count

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Clear maintenance indicators
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Sturdy construction that feels premium
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Designed to withstand elements (can stay installed year-round)
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Thoughtful packaging that protects during shipping
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Making Your Decision: Windmill AC vs Midea

Both are solid choices that outperform traditional window units. But when you factor in everything that matters—installation ease, design, user experience, and long-term satisfaction—Windmill emerges as the smarter choice for most people.

Choose Windmill If You Want:

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The easiest possible installation with pre-assembled parts
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The best-looking window AC on the market
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Reliable smart features that just work
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Innovative drainage system
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Multiple BTU options (6K, 8K, 8K WhisperTech, 10K WhisperTech, 12K WhisperTech)
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A company that offers 7-day support at support@windmillair.com
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Consider Midea If:

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The U-shaped design specifically appeals to you
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You don't mind a more complex installation
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You find a significant price difference
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You specifically need that partial window access
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You only need the 8,000 BTU size
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The Bottom Line: Why Windmill Wins

After comparing every aspect of these two excellent air conditioners, Windmill takes the crown. It's not just about cooling power or energy efficiency—both units excel there. It's about the complete experience from unboxing to daily use.

Windmill has thought through every pain point of window air conditioner ownership and addressed them with smart design choices. Add in the easier installation, superior aesthetics, and range of BTU options, and you have a clear winner.

Living with Your Choice: Long-Term Considerations

Your window air conditioner will hopefully serve you for many summers. Here's what to think about:

Maintenance and Support

Windmill's approach to customer service sets them apart. With support available seven days a week at support@windmillair.com, help is always there when you need it. The app sends gentle reminders about filter maintenance, and replacement filters (including activated carbon options) are easy to order. For any persistent issues, their support team is ready to help—no need to find local technicians.

Future-Proofing Your Purchase

Both companies regularly update their apps with new features. Windmill has shown consistent commitment to improving the user experience through software updates, adding features based on customer feedback. Their WhisperTech models represent their commitment to continuous innovation.

Final Thoughts: Cooling Made Simple

The best window air conditioner is the one that makes your life easier while keeping you comfortable. While the Midea U brings innovation with its unique shape, Windmill delivers where it counts: easy installation, beautiful design, reliable performance, and an overall experience that just works.

In the battle of Midea against Windmill AC, Windmill wins by focusing on what actually matters to real people in real homes.

Ready to experience the Windmill difference? Your perfectly cooled, beautifully appointed space awaits. Because at Windmill, we believe your comfort shouldn't come with compromises.

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When summer temperatures rise, finding an effective cooling solution becomes a priority for comfort and wellbeing. Window air conditioners are a great option, but many homeowners and renters find themselves wondering if they’re worth it. The decision to purchase an air conditioner depends on various factors including your living situation, budget, and cooling needs.

This guide will help you understand the pros and cons of window AC units, how they compare to other cooling options, and what to consider before making your purchase. We’ll explore everything from energy efficiency to installation requirements so you can make an informed decision about the right cooling solution for your space.

Cooling Options

When it comes to beating the heat, you have several options to consider. Let's break them down:

Window Air Conditioners

What they are: Compact units designed to fit into window frames

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Pros:
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  Relatively inexpensive ($150-$600)
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  Windmill is the #1 easiest to install (able to be completed in under an hour)
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  Effective for cooling single rooms quickly
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  Available in various sizes (5,000-12,000 BTU)
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Cons:
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  Can be noisy during operation unless they have unique technology
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  May not be as energy efficient as other options
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  Only cool one room effectively
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Portable Air Conditioners

What they are: Mobile cooling units you can move between rooms

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Pros:
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  Flexible placement options
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  No permanent installation required
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  Good for renters or those without suitable windows
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Cons:
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  Typically more expensive than window units
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- \n
  Often require more maintenance
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  Can be noisier due to internal components and ventilation hoses
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- \n
  Generally less efficient than window units
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Central Air Conditioning Systems

What they are: Whole-home cooling solutions that distribute cool air through ductwork

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Pros:
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  Cool your entire house evenly
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  More energy-efficient for cooling multiple rooms
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  Quieter operation (with the compressor outside)
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  Less visually intrusive inside your home
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Cons:
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  Significantly higher installation costs
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  Requires existing ductwork (or expensive installation)
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  Overkill if you only need to cool specific areas
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Key Considerations For Any System

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Energy Efficiency: Look for Energy Star certification to ensure your unit meets efficiency standards
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Smart Features: Consider options with voice control and scheduling capabilities
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Room Size: Match your cooling power (BTUs) to your square footage needs
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Maintenance Requirements: Factor in filter cleaning and seasonal servicing
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The right cooling solution depends on your specific circumstances. By evaluating your space, budget, and cooling needs, you can select a system that keeps you comfortable all summer long.

Understanding Window Air Conditioners: The Basics

Window AC units are self-contained systems designed to cool a single room by drawing in warm air, removing the heat and humidity, and blowing cold air back into the space. They’re installed directly in window frames, with the hot air exhaust facing outside.

These compact cooling solutions have come a long way in recent years, with modern window air conditioners offering improved efficiency and features compared to older models. These units are effective at lowering a room's temperature quickly and efficiently. But before deciding if a window AC is right for you, it’s important to understand both their advantages and limitations.

The Lifespan Question: How Long Do Window ACs Last?

When investing in any appliance, longevity is an important consideration. The average lifespan of window air conditioners is between 8 to 10 years, depending on usage and maintenance.

Compared to central air systems, which typically last 15-20 years, window units have a shorter lifespan. However, their lower upfront cost often balances this difference for many consumers, especially those who may not plan to stay in their current home for decades.

Cost Considerations: Initial Investment vs. Long-Term Value

Purchase and Installation Costs

Window AC units are generally less expensive to purchase and install than central HVAC systems, with prices ranging from $150 to $800 for a single unit. This makes them an attractive option for budget-conscious consumers or those cooling only one or two rooms. The installation process for window AC units is relatively straightforward, often requiring basic tools and minimal effort. For example, Windmill's window ac unit is rated #1 easiest to install.

Central air conditioning systems, by contrast, can cost up to $15,000 thousand dollars for equipment and professional installation. This significant price difference makes window units appealing for those with limited cooling needs or budget constraints.

Energy Costs Over Time

While the initial purchase price favors window units, energy consumption is another crucial factor to consider. Window AC units can use a decent amount of electricity, so it's important to understand how much energy they consume, especially if they’re oversized for the room they’re cooling.

Modern window air conditioners use less electricity than older models, with energy-efficient options featuring Energy Star certification to help reduce your utility bills. However, if you need to cool multiple rooms, running several window units simultaneously can sometimes exceed the energy costs of a central system.

Window AC vs. Central Air: Which Makes More Sense?

When Window ACs Make More Sense

Window air conditioners can be the perfect solution in several scenarios:

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For renters who cannot make permanent changes to their homes, a window AC unit is ideal for cooling a small room effectively
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In smaller living spaces like apartments, condos, or upstairs bedrooms in older homes
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When cooling only one or two rooms is necessary
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In homes without existing ductwork
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For those with limited budgets for cooling solutions
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When Central Air Might Be Better

Central air conditioning systems typically excel in these situations:

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Cooling larger homes or multiple rooms simultaneously is more efficient with a central AC unit, which can provide uniform cooling throughout the house.
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In homes with existing ductwork for efficient operation
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For homeowners planning to stay in their home long-term
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When uniform cooling throughout the house is a priority
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For those concerned about aesthetics and noise levels
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The Cooling Power Question: Understanding BTUs

Choosing the right BTU rating is essential for effective cooling with window AC units. BTU measures the cooling capacity of a btu window air conditioner, and selecting the appropriate rating for your room size is crucial for both comfort and efficiency.

Too few BTUs will result in inadequate cooling, while too many will cause the unit to cycle on and off frequently, wasting energy and potentially creating uncomfortable humidity levels. As a general rule:

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150-350 sq ft room: 5,000-8,000 BTUs
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350-550 sq ft room: 8,000-12,000 BTUs
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550-1,050 sq ft room: 12,000-18,500 BTUs
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Factors like ceiling height, sun exposure, and local climate can also affect your BTU needs, so it’s best to consult manufacturer guidelines for your specific situation.

Energy Efficiency: The Modern Window AC Advantage

Modern window air conditioners are much more efficient than older models, with technological improvements resulting in better cooling with less energy consumption. When shopping for a new unit, look for:

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Energy Star certification, which indicates the unit meets efficiency guidelines set by the EPA
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A high Energy Efficiency Ratio (EER) – the higher the number, the more efficient the unit
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Smart features like programmable timers and temperature controls
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Variable fan speeds and cooling modes
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Modern window air conditioners are designed to minimize their impact on a home's energy consumption, making them a more sustainable choice for cooling.

These features help reduce energy waste and can lead to significant savings on your energy bills compared to older window units.

Installation

DIY or Professional Installation?

One of the advantages of window AC units is that they’re designed for relatively straightforward installation. With the pre-installation tool kit that comes with the unit, homeowners can install a window unit themselves in less than an hour on average.

However, proper installation is crucial to ensure the unit functions correctly and efficiently. Improper installation can lead to higher energy bills due to reduced efficiency, create security risks, and potentially damage your window frame.

Window Type Compatibility

Window AC units are designed to be installed in specific types of windows, typically single- and double-hung windows. If you have casement windows, sliding windows, or other non-standard styles, you may need to explore other cooling options or consider special mounting kits. Measuring the window pane dimensions is crucial to ensure a proper fit for the appliance, which is essential for efficient operation.

Security Considerations

Window AC units can create a security risk if installed improperly. Be sure to:

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Secure the unit with support brackets to prevent it from falling
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Seal gaps around the unit to prevent intruders from manipulating it
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Consider removing and storing the unit during seasons when it's not in use
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Use window locks designed to work with AC installations
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With proper installation and security measures, a window AC unit can provide reliable cooling without compromising your home's safety.

Noise Factors

One common complaint about window AC units is noise. Window AC units can be noisy, often interfering with sleep during the night or making it difficult to enjoy quiet activities like reading or watching television. Despite the noise, window AC units are effective at making indoor temperatures cooler and more comfortable during the hot summer months.

Newer models tend to operate more quietly than older ones, with some premium units featuring noise-reduction technology such as Windmill's Whispertech™. When shopping for a window AC, check the decibel rating – anything under 60 dB is considered relatively quiet for an air conditioner.

If noise is a major concern, consider:

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Placing the unit in a window away from sleeping areas
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Operating the unit on low fan settings when possible
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Ensuring the unit is properly secured to minimize vibration
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Investing in a premium model with noise-reduction features
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Maintenance Requirements

Regular maintenance of window AC units helps prevent mold and mildew build-up, ensures efficiency, and extends the life of your unit. Key maintenance tasks include:

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Cleaning or replacing air filters every 2-4 weeks during heavy use
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Cleaning the condenser coils at least once per season
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Checking and clearing the condensation drain to prevent water damage
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Inspecting seals and insulation around the unit
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Proper storage during off-seasons
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Regular maintenance helps ensure that the unit continues to provide fresh air and operates efficiently.

While these tasks are generally straightforward, neglecting regular maintenance can lead to reduced efficiency, higher energy bills, and a shorter lifespan for your unit.

Insulation

Proper insulation is important for maximizing the efficiency of window AC units. Even the most energy-efficient air conditioner will struggle in a poorly insulated space, as cool air quickly escapes while warm air seeps in. Proper insulation and understanding the square footage of your space are crucial for maximizing the efficiency of window AC units.

A correctly insulated and air-sealed house can help reduce energy use significantly when using air conditioning units. Consider these insulation factors:

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Ensure proper weatherstripping around windows and doors
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Use insulating window films or curtains to reduce heat gain
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Seal any gaps around the AC unit itself with foam insulation
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Address any major insulation issues in walls, ceilings, or floors
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By improving your home’s insulation, you can enhance the effectiveness of your window AC and potentially reduce your energy costs.

Smart Features

Today’s window air conditioners often come equipped with smart features that make them more convenient and efficient:

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Wi-Fi connectivity for remote operation via smartphone apps
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Voice control compatibility with systems like Google Assistant and Amazon Alexa allows for convenient and hands-free operation
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Programmable schedules to adjust cooling based on your routine
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Temperature sensors that maintain consistent comfort
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Energy usage monitoring to help manage electricity consumption
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These smart features can significantly enhance the user experience, allowing for more precise temperature control and potentially reducing energy waste by cooling only when needed.

Window AC vs. Portable Air Conditioners: Which is Better?

While both window and portable air conditioners are designed for room-specific cooling, they have important differences:

Energy Usage

Portable air conditioners typically use more energy than window air conditioners due to heat escaping from poorly insulated hoses. This makes window units generally more efficient for the same cooling capacity.

Installation Flexibility

Portable units offer more flexibility in placement and don’t require permanent installation in a window. However, they still need access to a window for venting hot air and typically take up more floor space. Portable air conditioners can be moved between different rooms, offering flexibility in cooling multiple spaces as needed.

Cooling Effectiveness

Window units tend to cool more effectively because all heat exchange happens outside the room. Portable units often struggle with heat leakage from their exhaust hoses, reducing overall efficiency.

For most situations where a window installation is possible, a window AC unit will provide better cooling performance and energy efficiency than a comparable portable model.

Special Considerations for Renters

Window AC units can be a low-effort fix for renters who cannot make permanent changes to their homes. Before installing a window unit in a rental property:

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Check your lease agreement for any restrictions on AC installation
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Consider options that won't damage window frames or walls
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Talk to your landlord about preferred installation methods
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Look into portable units if window installation isn't permitted
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Be prepared to remove and patch any installation modifications when moving out
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With careful planning, renters can enjoy the cooling benefits of window AC units without risking their security deposit.

Calculating Cost Efficiency: When is a Window AC Worth It?

To determine if a window AC is cost-effective for your situation, consider these factors:

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Initial cost of the unit and installation
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Expected lifespan (typically 8-10 years)
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Annual energy costs based on local electricity rates
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Maintenance expenses over time
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Cooling needs (one room vs. multiple rooms)
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Length of cooling season in your climate
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Choosing the right air conditioning system can help you save money on energy bills and maintenance costs over time.

For smaller spaces or situations where you need to cool only one or two rooms, window units often provide the most economical solution. For whole-home cooling in larger spaces, central air might be more cost-effective in the long run despite higher initial costs.

Making the Final Decision: Is a Window AC Worth It for You?

After considering all these factors, you can make an informed decision about whether a window AC is worth it for your specific situation. A window AC unit might be your best choice if:

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You need to cool only one or two rooms
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You’re renting or in temporary housing
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Your budget doesn’t allow for central air installation
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Your home lacks the ductwork needed for central air
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You want a flexible, affordable cooling solution
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When considering a new air conditioner, it's important to evaluate factors such as window type compatibility and whether to remove the unit after summer.

Ultimately, the value of a window AC depends on your unique cooling needs, living situation, and priorities. By carefully weighing the pros and cons outlined in this guide, you can confidently choose the cooling solution that best serves your comfort needs and budget constraints.

Window air conditioners have provided reliable cooling for decades, and today’s models offer better efficiency, quieter operation, and smarter features than ever before. Whether as a primary cooling system or a supplement to existing cooling, a quality window AC unit can be a worthwhile investment in your comfort and well-being during hot weather.

Ready to Explore Window AC Options?

At Windmill, we've redesigned the window AC with modern aesthetics, smart features, and efficient performance. Our units combine the affordability and simplicity of traditional window ACs with innovations that address common pain points like noise, installation difficulties, and energy efficiency.

Visit our product pages to learn more about how Windmill's window AC units can provide the cooling comfort you need with the style, efficiency, and smart features you want.

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If you've been following environmental news lately, you've probably heard about microplastics turning up everywhere. But here's what might surprise you: these tiny particles aren't just in our oceans and drinking water. They're in the air we breathe, outside and in our homes. Let's dive into what we know about airborne microplastics and, more importantly, what air purification can do about them.

Understanding Microplastic Particles in Your Home

First, let's get clear on what we're talking about. Microplastics are tiny plastic particles smaller than 5 millimeters, about the size of a sesame seed or smaller. Many are invisible to the naked eye. These plastic fragments come from the breakdown of larger plastic debris, synthetic materials in our homes, and even the clothes we wear.

The concerning part? Research shows that indoor air typically contains higher concentrations of microplastics compared to outdoor air. Since most of us spend about 90% of our time indoors, this matters for our daily exposure.

Where Do Airborne Microplastics Come From?

Understanding the sources helps us tackle the problem. In indoor environments, microplastic particles primarily come from:

Synthetic Textiles and Fibers

Every time you sit on your couch, walk across a carpet, or even get dressed, synthetic fibers can shed into the surrounding air. These synthetic materials—polyester, nylon, acrylic—are everywhere in modern homes. Your favorite fleece jacket? It's shedding tiny particles. That cozy synthetic blanket? Same story.

Plastic Degradation

All the plastic items in our homes slowly break down over time. Plastic storage containers, toys, furniture, and decorative items all contribute small plastic particles to our indoor air as they age.

Outdoor Sources

Outdoor air carries its own load of atmospheric microplastics from sources like:

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Tire wear from vehicles
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Industrial plastic production
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Breakdown of plastic waste
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Atmospheric transport from distant sources
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When we open windows or doors, or when air enters through ventilation systems, these outdoor particles join the indoor mix.

The Science of Atmospheric Microplastics

Recent studies using advanced analytical techniques have revealed just how prevalent these particles are. In a groundbreaking 2019 study published in Science Advances, researchers found microplastics in atmospheric samples from urban areas, rural regions, and even remote locations far from obvious plastic pollution sources. The study detected microplastics in snow samples from the Arctic and Swiss Alps, demonstrating that these particles can travel thousands of kilometers through the atmosphere.

What makes this particularly interesting is how these tiny particles behave. Unlike larger plastic debris that might settle quickly, many airborne microplastic particles are small enough to stay suspended in air for extended periods. They can travel on air currents, get incorporated into cloud droplets, and eventually fall back to earth through atmospheric deposition.

The chemical composition of these particles varies widely. Common types include:

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Polyethylene terephthalate (PET) from bottles and packaging
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Polypropylene from various consumer products
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Polyethylene from bags and films
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Synthetic fibers from textiles
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Microplastic Pollution: From Ocean to Outdoor Air

While we've long known about marine microplastic particles and their impact on aquatic environments, the connection between marine pollution and atmospheric particles is relatively new science. Sea spray can actually lift microplastics from the ocean surface into the air, creating a cycle where marine anthropogenic litter becomes part of atmospheric transport systems.

This means that plastic pollution isn't contained to where it starts. A plastic bottle discarded on a beach doesn't just affect marine environments—as it breaks down, those particles can end up in the air thousands of miles away.

Exposure and Human Health Impacts

The question everyone wants answered: what does this mean for human health? While research is ongoing, here's what we know:

How We're Exposed

Airborne microplastics can be directly and continuously inhaled into the human body. The respiratory system is the primary route of exposure for atmospheric microplastics. Every breath we take potentially brings these tiny particles into our lungs.

Recent studies have detected microplastics in human lung tissue and even human blood, confirming that these particles don't just enter our bodies—some stay there. The smaller particles, particularly nano plastics (even tinier than microplastics), may be able to penetrate deeper into tissue.

Potential Concerns

While we can't make definitive health claims without more research, scientists are investigating several areas of concern:

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Physical impacts: The particles themselves may cause irritation or inflammation in lung tissue
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Chemical additives: Many plastics contain chemical additives that could be released in the body
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Transported substances: Microplastics can carry other air pollutants, heavy metals, and organic pollutants on their surfaces
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What Can You Do? Practical Steps for Cleaner Indoor Air

While we can't eliminate all microplastic exposure, we can take meaningful steps to reduce it in our homes:

Source Reduction

Start with the sources:

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Choose natural fibers when possible (cotton, wool, linen)
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Minimize unnecessary plastic items in your home
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Store plastic items in closed cabinets to reduce degradation exposure
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Use glass or metal containers instead of plastic when practical
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Improve Ventilation

While outdoor air generally has lower microplastic concentrations than indoor air, simply opening windows isn't always the answer. Consider:

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Ventilating during times of better outdoor air quality
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Using exhaust fans in areas with high particle generation (like laundry rooms)
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Ensuring proper airflow throughout your home
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Creating positive pressure with filtered air to reduce infiltration of unfiltered outdoor air
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Regular Cleaning

Microplastics settle on surfaces and can be resuspended into the air. Regular cleaning helps:

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Vacuum frequently with a HEPA filter vacuum
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Damp dust instead of dry dusting to avoid redistributing particles
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Wash synthetic textiles regularly to remove loose fibers
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Clean or replace HVAC filters monthly during heavy use seasons
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The Role of Air Filtration

Perhaps the most direct way to address airborne microplastics is through air filtration. Modern air conditioners and air purifiers with medical grade HEPA filters can capture many of these particles before you breathe them in. When your air conditioner runs continuously during hot months, it's constantly filtering your indoor air—an often-overlooked benefit beyond just cooling.

Understanding Filtration Capabilities

Medical-grade HEPA filters, now available in both air purifiers and some premium air conditioners, can capture 99.97% of particles as small as 0.3 microns. This is crucial for microplastics, which typically range from 1 to 5,000 microns, with many in the smaller range that are most easily inhaled. The efficiency ratings you should look for include:

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CADR (Clean Air Delivery Rate): Measures how quickly a unit can clean air of specific pollutants
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Room size ratings: Ensure the unit can handle your space—some can efficiently clean rooms up to 1,950 square feet
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Air changes per hour (ACH): How many times the unit filters all the air in your room per hour
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Key Filtration Features to Consider

When evaluating air cleaning options:

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Multi-stage filtration: Look for 3-in-1 systems that combine pre-filters, HEPA filters, and activated carbon layers
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Medical-grade HEPA filters: These capture microplastics along with other harmful particles like bacteria, viruses, and allergens
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Activated carbon layers: Essential for removing VOCs that microplastics can carry on their surfaces
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Real-time monitoring: Units with PM2.5 sensors can show you exactly when microplastic levels might be elevated
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Smart controls: Allow you to increase filtration during high-pollution events or maintain consistent air quality automatically
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Operational Considerations

For maximum microplastic removal:

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Continuous operation: Unlike traditional use patterns, running your purifier 24/7 ensures constant particle removal
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Ultra-quiet technology: Modern units operate as low as 16 dB, quieter than a whisper, making continuous use practical
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Strategic placement: Position units where you spend the most time—bedrooms, living areas, and home offices
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Filter maintenance: Replace filters every 6 months or as recommended—a clogged filter can't capture new particles
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Eco modes: Use automated settings that adjust filtration based on real-time air quality readings
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Remember, whether you're using an air conditioner, air purifier, or both, proper filtration is your first line of defense against inhaling microplastics. The investment in quality filtration pays dividends not just in removing these particles, but in overall air quality improvement that affects everything from sleep quality to respiratory health.

Looking Forward: Research and Solutions

The science of atmospheric microplastics is rapidly evolving. While we've learned a lot, we still need to understand quite a bit more. Ongoing research focuses on:

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Better detection methods for smaller particles
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Understanding long-term health impacts
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Developing more effective filtration technologies
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Tracking atmospheric transport patterns
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Assessing risk levels for different exposure scenarios
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Creating a Healthier Indoor Environment

While we can't completely escape microplastics in our modern world, we can significantly reduce our exposure, especially in the spaces where we spend the most time. By understanding the sources of indoor plastic pollution and taking practical steps to address them, we can create healthier home environments.

Remember, the goal isn't perfection—it's progress. Every step you take to reduce plastic use, improve air quality, and filter your indoor air makes a difference. Start with what's manageable for you, whether that's investing in quality air filtration, choosing natural fibers for your next purchase, or simply being more mindful about the plastics in your home.

Modern technology offers powerful tools for improving indoor air quality. Smart air conditioners and purifiers can now track air quality, remind you when filters need changing, and ensure consistent filtration throughout the day. These advances mean cleaner air doesn't require constant attention—it can happen automatically in the background of your daily life.

Advanced Air Filtration with Windmill

When it comes to protecting your indoor air from microplastics and other pollutants, Windmill takes a comprehensive approach with both their air conditioning and air purification solutions. Understanding that clean air is about more than temperature control, Windmill's advanced filtration technologies were specifically engineered to tackle today's most pressing air quality challenges, including plastic pollution.

Medical-Grade Protection with the Windmill Air Purifier

For those seeking dedicated air purification, the Windmill Air Purifier offers hospital-level filtration in a design that actually complements your home:

3-in-1 Medical-Grade HEPA System: This comprehensive filtration captures 99.97% of particles as small as 0.3 microns—including the microplastics that pose the greatest inhalation risk. The system combines:

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Pre-filter for larger particles
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Medical-grade HEPA filter for microplastics, allergens, and pathogens
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Activated carbon layer for VOCs
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Impressive Coverage and Performance: Third-party tested and AHAM Verifide certified with CADR ratings of 343 for pollen and 260 for PM2.5, one unit can efficiently clean spaces up to 1,950 square feet. This means comprehensive microplastic removal throughout your entire living area, not just one room.

Ultra-Quiet Operation: Starting at just 16 dB—quieter than a whisper—the air purifier can run 24/7 without disrupting sleep or daily activities. This continuous operation is crucial for maintaining consistently low microplastic levels.

Why Choose Windmill for Air Quality

In a world where microplastics are an emerging concern, Windmill offers the most comprehensive approach to indoor air quality. From medical-grade HEPA filtration in their air purifiers to antimicrobial protection in their ACs, every product is designed with your health in mind. Energy Star certified and backed by third-party testing, you can trust the performance claims.

The support team at support@windmillair.com is available seven days a week to help you design the right air quality solution for your specific needs and space. Because when it comes to the air you breathe, you deserve technology that's as serious about your health as you are.

Ready to take control of your indoor air quality? Explore how Windmill's complete air care ecosystem—from advanced air purifiers to smart air conditioners—helps you breathe easier in a world of increasing air quality challenges.

Frequently Asked Questions

Are microplastics in the air we breathe?

Yes, microplastics are present in the air we breathe, particularly in indoor environments where concentrations are typically higher than outdoors. These tiny plastic particles, smaller than 5 millimeters, come from synthetic clothing fibers, plastic packaging breakdown, cosmetics, and household items, and can be inhaled deep into our lungs where they may cause respiratory issues.

Do air purifiers remove microplastics?

Yes, air purifiers equipped with HEPA (High Efficiency Particulate Air) filters can effectively capture microplastics from indoor air. HEPA filters capture 99.97% of particles as small as 0.3 microns, which includes most microplastics that typically range from 0.1 to 5 microns in size, making them an effective solution for reducing microplastic exposure indoors.

References

Bergmann, M., Mutzel, S., Primpke, S., Tekman, M. B., Trachsel, J., & Gerdts, G. (2019). White and wonderful? Microplastics prevail in snow from the Alps to the Arctic. ScienceAdvances. https://www.science.org/doi/10.1126/sciadv.aax1157

Jenner, L. C., Rotchell, J. M., Bennett, R. T., Cowen, M., Tentzeris, V., & Sadofsky, L. R. (2022, 07 20). Detection of microplastics in human lung tissue using μFTIR spectroscopy. ScienceDirect. https://www.sciencedirect.com/science/article/pii/S0048969722020009

Leslie, H. A., van Velzen, M. J.M., Brandsma, S. H., Vethaak, A., Garcia-Vallejo, J. J., & Lamoree, M. H. (2022, 05). Discovery and quantification of plastic particle pollution in human blood. Environmental International, 163. https://www.sciencedirect.com/science/article/pii/S0160412022001258

United States Environmental Protection Agency. (2024, July 22). Microplastics Research | US EPA. Environmental Protection Agency (EPA). Retrieved June 13, 2025, from https://www.epa.gov/water-research/microplastics-research

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How long does an air conditioner last? Whenever you purchase a new appliance, it’s important to consider when you might need to repurchase the unit. This is especially important with potential high-usage appliances like window air conditioners. In general, a window unit air conditioner should last eight to ten years, but that number can vary widely. There are many factors that contribute to the lifespan of an air conditioner, like how much your unit is in use, how well it is maintained, and the climate in which it is operated. This blog will teach you how to make healthy lifestyle decisions for your AC to make sure your AC lasts as long as possible and help you save money on energy bills while maintaining optimal air quality in your home.

Pick the right machine for the job

If your window units are burning out in one or two years, there’s a chance you’ve picked the wrong machine. By picking a properly sized machine, you extend how long an air conditioner lasts. By size, we don’t mean fitting one properly to the window—though of course that’s also important! What we mean is selecting a machine with the appropriate cooling capacity for the square footage of the space you’re cooling. Check the BTUs (British Thermal Units) of a machine before purchasing and make sure that number matches where you intend to use the unit. An undersized air conditioning unit will struggle to produce enough cold air and run constantly, leading to premature failure and higher energy bills. On the other hand, an oversized ac unit will cycle on and off too frequently, failing to properly dehumidify your space and creating uncomfortable conditions.

Properly maintain your machine

How long a window air conditioner lasts is directly related to how well you maintain your unit. Like any machine, a window unit AC is a collection of interlocking systems. When one of those systems breaks down, the whole machine suffers. And as we’re fond of saying, the easiest way to fix a problem is to prevent it in the first place. We’ve covered a lot of maintenance tips in other places, so make sure to check those blogs out as well for more info. Regular maintenance not only extends your ac unit's lifespan but also ensures consistent cool air production and better air quality throughout your home.

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Make sure your unit is properly installed and insulated. If there are gaps in the insulation, your unit will have to work harder to keep your home cool. Likewise, improperly installed units can suffer from improper drainage, which can lead to issues like mold and mildew buildup, creating potential health hazards.
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Checking for proper drainage prevents water damage and rot. Ensure the condenser drain is free of debris to avoid clogs that can cause water to back up into your air conditioning system.
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Regularly check your filter! Most modern AC units come with a check filter light to let you know when the filter requires an immediate swap. However, it’s a good idea to check your filter more regularly. How long an air conditioner filter lasts will depend on many factors, but a good rule of thumb is to check the filter at least every month. Clean air filters are crucial for maintaining good air quality and preventing dust accumulation in your system.
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Replace your filter when necessary. The Windmill AC has a dual filtration system, with a washable mesh filter and a replaceable activated carbon filter. Using a washable air filter can save money on replacements over the life of your window air conditioner unit.
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Check the vents of your machine to make sure they stay clean. Clogged vents will make your AC work harder than necessary, which will shorten the lifespan of its internal mechanism. Keeping the exterior of the unit clean will not impede airflow and helps maintain optimal performance.
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Inspect the condenser coils and fins regularly to maintain AC performance. Bent fins can restrict airflow, while dirty coils force your air conditioning unit to work harder, increasing energy consumption.
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Regularly check the power cord for wear to prevent serious electrical issues. A damaged cord can become a fire hazard and should be replaced immediately.
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Clean the window area before installation to allow for proper airflow. Remove any debris, dust, or obstructions that might interfere with your window ac unit's operation.
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Inspect other components, such as hoses and seals, to ensure they are secured and tightened. Loose connections can lead to refrigerant leaks and reduced cooling efficiency.
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Practice smart AC usage. When you leave home, make sure to turn the unit off so you don’t cool an empty room. On more temperate days, shut off your AC to give the machine a break. Maintaining the right thermostat setting can improve AC efficiency—experts recommend setting your air conditioner no lower than 20 degrees below the outside temperature when you're home. Using an AC unit at extremely low thermostat settings can strain it and reduce its lifespan.
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Remember, how long a window unit air conditioner lasts will largely depend on how well you take care of your machine. As you take care of your machine, take note of stuff like how long does an air conditioner filter last for you. Once you establish regular behavior for your machine, you’ll know when something out of character occurs. For example, if a filter normally lasts for a month, but you find yourself replacing the filter every other week, then you’ll know an issue is occurring and can begin troubleshooting. If you have any questions on how to properly maintain your Windmill AC unit, contact support@windmillair.com for assistance.

Understand the climate you live in

Where you live, and what type of climate you live in, will have a major impact on how long your air conditioner lasts. If you live on a coast, ocean salt in the air can cause your condenser coils to corrode or otherwise wear out faster. Similarly, very humid environments foster mold growth, which will also shorten the lifespan of your window unit. Units in hot and humid climates experience more wear and tear than those in milder climates, potentially reducing the average lifespan of your air conditioning system by several years. When purchasing a new AC unit, you should adjust expectations for the machine's lifespan to fit your climate.

Some climate-based problems are easy to address. If you live somewhere with snowy winters, consider purchasing a winter cover for your AC unit. For places with very heavy snowfall, it can be a good idea to uninstall your AC and store it somewhere dry for winter months. This prevents moisture damage and extends the life expectancy of your window units.

Furthermore, there’s a few installation tips that help your AC resist the elements. Install your air conditioner in a window that doesn’t receive a ton of sun exposure. This prevents the machine from overheating and misreporting the temperature. If you live in an area with pine trees, or other needle-bearing trees, avoid installing the AC unit below one of those trees. While most falling leaves will bounce off an AC unit, slender vegetation like pine needles can potentially slip in through the rear vents of your AC and damage the internal mechanisms. Consider installing window locks to secure your unit and prevent it from shifting during storms, which can damage both the air conditioner units and your window frame.

Signs It's Time to Replace Your Window Air Conditioner

If you follow our advice, you’ll maximize the lifespan of your unit. Like we’ve been saying, how long an air conditioner lasts depends on how you take care of it. But for all air conditioners, there comes a time when their functionality diminishes. So the question becomes: can you fix it, or should you get a new machine?

Before replacing your machine, check the filter and insulation for issues. Make sure you’ve installed your AC unit in a supportive location. Test the power source to make sure that it’s not a power issue. If you hear odd noises like grinding, squealing, or rattling, these unusual noises often indicate serious mechanical problems that may require professional attention.

Key Warning Signs to Replace Your Window Air Conditioner Unit:

With window units, the cost of repair can often exceed the cost of replacement. Issues with the compressor or with the level of refrigerant are usually signs that it’s time to get a new machine. A good sign that you need a new unit is if your AC is producing warm air. Once the cooling function is gone, there’s not much to do but replace the machine.

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Foul odors emanating from an AC unit can signify underlying health risks, such as mold or electrical problems. A musty smell often indicates mold or mildew buildup, while a burning smell could signal a wiring problem or fire hazard.
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Frequent breakdowns and increasing repair costs. When repair costs approach 50% of the price of a new unit, it's generally more economical to replace your window air conditioner.
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Rising energy bills despite consistent usage patterns. Older ac units lose efficiency over time, and newer energy efficient models can save significant money on cooling costs.
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Refrigerant leaks, which not only reduce cooling capacity but also pose environmental impact concerns. Modern air conditioner units use more eco-friendly refrigerants.
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Your air conditioning unit struggles to maintain consistent temperatures or takes longer to cool your space than it used to.
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The unit is over 10 years old. Even well-maintained window air conditioner units become less efficient over time, and newer models offer better energy efficiency and features.
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Making the Smart Choice: Repair vs. Replace

When deciding whether to repair or replace your window air conditioner, consider both immediate repair costs and long-term savings. A new, energy efficient unit may have a higher upfront cost but can save money through lower energy bills and reduced maintenance needs. Additionally, newer air conditioning systems often provide better air quality through improved filtration and humidity control.

If you're considering alternatives, portable air conditioners offer flexibility for cooling different rooms, while mini split systems provide efficient cooling without window installation. For whole-home solutions, a central air conditioner or central air conditioning system might be worth considering, especially if you're cooling multiple rooms. Central ac units typically have a longer lifespan than window units and can be more cost-effective for larger spaces.

Of course, our Windmill support staff is available seven days a week to help you troubleshoot issues with your window unit. Make sure to try some fixes before replacing your air conditioner. The last thing you want to do is give up on your AC before it gives up the ghost. However, when repair costs mount and efficiency drops, investing in a new, energy efficient air conditioning unit can improve your home comfort, reduce environmental impact, and save money in the long run.

Frequently Asked Questions

How often does an AC unit need to be replaced?

Window AC units typically need to be replaced every 8-10 years, though this varies based on usage, maintenance, and climate conditions. Units in harsh climates or those that are poorly maintained may need replacement sooner, while well-maintained units in mild climates can last longer.

How do I know when my AC needs replacing?

Replace your AC unit when it produces warm air instead of cold, makes unusual noises like grinding or squealing, causes rising energy bills, requires frequent repairs, or is over 10 years old. Other warning signs include foul odors, refrigerant leaks, and when repair costs approach 50% of the price of a new unit.

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When summer temperatures rise, window air conditioners become essential for keeping your home comfortable. Whether you're a first-time buyer or looking to replace an older model, understanding the ins and outs of window AC units can help you make informed decisions about purchasing, installing, and maintaining your cooling system.

We've gathered the most frequently asked questions about window air conditioners to create this list. From selecting the right size to proper maintenance and troubleshooting, we've got you covered with expert answers to help you stay cool all summer long.

Choosing the Right Window Air Conditioner

What Size Window Air Conditioner Do I Need?

Matching your window AC unit to your room size is crucial for optimal performance. BTU capacity (British Thermal Units) determines how effectively an air conditioner can cool a space. Using a unit with insufficient BTU capacity will struggle to cool your room, while an oversized unit will cycle on and off too frequently, wasting energy and providing uneven cooling.

Here's a quick guide to help you select the appropriate size:

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For rooms up to 250 sq. ft., choose a window air conditioning unit with 6,000-8,000 BTUs
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For larger rooms between 425-525 sq. ft., look for units with approximately 10-12,000 BTUs
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For very sunny rooms, increase the BTU capacity by 10 percent
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For kitchens, add an additional 4,000 BTUs to the recommended capacity
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Remember that measuring your room's square footage is essential to ensure you get the proper unit size needed to cool the space effectively.

What is an Energy Star Rating and Why Does It Matter?

Energy Star ratings recognize and promote energy-efficient appliances that pass strict energy efficiency guidelines. Window air conditioners with Energy Star certification generally reduce energy costs by approximately 30 percent compared to non-certified models.

These ratings are particularly important for window air conditioners, which can consume significant electricity during hot summer months. While the initial cost might be slightly higher, the long-term savings on your energy bills make Energy Star rated units a smart investment.

Can a Window AC Unit Cool Multiple Rooms?

Window air conditioners are designed to cool individual spaces and are most efficient when cooling the room they're installed in. While cool air may drift into adjacent rooms, the effectiveness diminishes significantly with distance.

For cooling multiple rooms, consider:

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Strategically placing fans to help circulate the cool air
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Installing multiple units for larger homes
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Keeping doors open between rooms you want to cool
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Remember that window air conditioners are more efficient at cooling small areas than central HVAC systems, making them perfect for apartments or individual rooms in larger homes.

Installation Best Practices

How Do I Properly Install a Window Air Conditioner?

Proper installation of your window ac is important for efficiency, preventing water leakage, and avoiding accidents. Here are the key points to remember:

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First, ensure your window is large enough and provides adequate support for the unit. Use the installation kit that comes with your air conditioner, which typically includes brackets, foam insulation, and screws.
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Install the unit with a slight downward tilt toward the outside (about 1/4 inch) to allow proper drainage of condensed water. This slight tilt is essential for preventing water from leaking back into your home.
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Properly seal any remaining gaps around the unit with foam insulation to prevent air leaks. This improves cooling efficiency by keeping hot air out and cold air in.
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Always follow the manufacturer's instructions specific to your model for the best results during the installation process.

Can I Use an Extension Cord with My Window AC?

Using an extension cord with a window air conditioner is not recommended due to fire hazards. Window AC units draw significant power and require a direct connection to an electrical outlet that can handle their electrical load.

If the outlet isn't close enough to your window, consider these alternatives:

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Have a qualified electrician install a new outlet closer to the window
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Choose a different window that's closer to an existing outlet
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Use a specialized air conditioner extension cord rated for the specific amperage of your unit (as a temporary solution only)
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Always prioritize safety over convenience when it comes to electrical components in your home.

What About Support and Security for My Window Unit?

Ensuring your window air conditioner is securely supported is needed for safety and performance. Larger units, in particular, need proper bracing to prevent accidents.

Many window AC units come with brackets or an installation kit that provides support from below or secures the unit to the window frame. For added security, especially on ground-floor windows, consider installing window locks that still allow the AC unit to fit while preventing the window from being opened further.

Check your unit periodically to ensure it remains secure, especially after storms or high winds. A properly secured unit not only operates more efficiently but also prevents potential damage to your window frame or injury from falling units.

Maintenance and Care

How Often Should I Clean the Air Filter?

Regular cleaning of the air filter is essential to maintain efficiency and prolong the lifespan of your window air conditioner. An air filter should be cleaned every month during heavy use or as recommended by the manufacturer.

Dirty air filters hinder airflow, reduce cooling efficiency, and increase energy costs. They can also lead to moisture buildup on the evaporator coil, causing it to freeze and further reducing performance.

To clean the filter:

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Turn off and unplug your unit
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Remove the front panel to access the filter
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Gently remove the filter and clean it with warm water and mild detergent
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Rinse thoroughly and allow it to air dry completely before reinstalling
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For some models, filters should be replaced rather than cleaned. Check your user manual for specific guidance.

How Do I Prevent and Remove Mold in My Window AC?

Mold can form on window air conditioner components if not regularly inspected and cleaned, which can negatively affect indoor air quality and lead to health issues.

The evaporator coils, drain pan, air filter, and ducts are particularly susceptible to mold growth due to condensation. This is especially true if your unit isn't properly maintained.

To prevent mold growth:

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Clean the air filter regularly
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Inspect and clean the interior, filter, and drainage system for mold at least once a year
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Ensure proper drainage to prevent water accumulation
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Run the fan occasionally even when not cooling to keep components dry
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If you detect a musty odor from your unit, it's likely time for a deep cleaning. Use a damp cloth with mild detergent to clean accessible surfaces, and a soft brush or brush attachment on a vacuum for harder-to-reach areas. Running the unit after cleaning can help clear out lingering smells.

What Parts of My Window AC Need Regular Cleaning?

Beyond the air filter, several components of your window air conditioner benefit from regular cleaning:

The condenser coils and fins should be cleaned regularly to help improve airflow and efficiency. These components collect dust and debris from outside air, which can reduce performance over time.

The drain pan and drain line require periodic cleaning to prevent clogs. A clogged drain line can cause water to back up and overflow the drain pan, leading to water leakage and potential water damage to your windowsill.

The front grille and vents should be dusted regularly to maintain optimal airflow. Use a soft brush or vacuum with a brush attachment for these areas.

Always unplug the unit before cleaning any components, and avoid getting water on electrical components during the cleaning process.

Should I Cover My Window AC During Winter?

Covering a cool-only window air conditioner during winter is generally recommended to protect it from harsh weather. Ideally, window units should be removed and stored inside during the off-season.

If removal isn't practical, use a specially designed air conditioner cover that protects from moisture and debris while still allowing some airflow to prevent condensation buildup inside the unit.

When covering your unit, ensure it's clean and completely dry first to prevent mold growth during storage. Remove any loose debris and clean the filter before covering or storing.

Troubleshooting Common Issues

Why Is My Window AC Leaking Water?

An improperly installed unit without the correct downward tilt can cause condensed water to flow into your home instead of draining outside. Check that your unit is slightly tilted toward the exterior.

A clogged drain line or drain hole can prevent proper drainage of condensation. Regularly inspect and clear these drainage paths to prevent backup.

A cracked or damaged drain pan can no longer contain water properly. While some minor cracks can be repaired with waterproof sealant, significant damage usually requires professional service or unit replacement.

Dirty air filters can cause the evaporator coil to freeze. When the ice melts, it can overwhelm the drain system and cause leaking. Regular filter cleaning can prevent this issue.

Remember that water leaks can cause water damage and rot your windowsills if left unaddressed.

Why Is My Window AC Not Cooling Properly?

If your window air conditioner isn't producing cool air as expected, several factors could be contributing:

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Dirty air filters are often the culprit, as they restrict airflow and reduce cooling efficiency. This simple maintenance issue is easy to fix with regular cleaning.
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Improper insulation around the unit allows cold air to escape and hot air to enter, reducing overall effectiveness. Check for and seal any gaps around your installation.
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Low refrigerant levels due to a refrigerant leak can significantly impact cooling performance. Unlike filter cleaning, checking for refrigerant issues is not typically a DIY task and requires professional service.
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An undersized unit for your room dimensions will struggle to maintain comfortable temperatures. Ensure you've selected the correct BTU capacity for your space.
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A malfunctioning thermostat may not be accurately sensing the temperature. Try adjusting the settings to see if performance improves.
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Why Is My Window AC Making Strange Noises?

Unusual sounds from your window air conditioner often indicate specific issues:

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Rattling or vibrating noises frequently stem from loose parts or improper installation. Check that the unit is securely mounted and that all accessible screws and components are tight.
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Buzzing or humming could indicate electrical problems or a struggling compressor. If the noise persists after ensuring proper installation, professional service may be required.
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Clicking sounds when the unit turns on or off are usually normal, but frequent clicking might signal thermostat issues or electrical problems.
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Gurgling noises often relate to the refrigerant flow and are typically normal. However, loud or persistent gurgling might indicate a refrigerant issue requiring professional attention.
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Addressing noise issues promptly can prevent more significant problems from developing and extend your unit's lifespan.

Why Is Hot Air Coming From My Window AC?

Hot air blowing from your window air conditioner unit can be concerning and usually indicates a specific problem:

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A dirty air filter restricting airflow is a common and easily fixed cause. Clean or replace your filter following the manufacturer's instructions.
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A malfunctioning compressor cannot properly cool the air. If your unit is blowing hot air and you've eliminated filter issues, the compressor may need professional service.
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Incorrect mode settings sometimes cause confusion. Ensure your unit is set to \"cool\" rather than \"fan\" mode, which simply circulates existing room air without cooling.
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Low refrigerant levels due to a leak prevent proper cooling. This requires professional service to locate the leak, repair it, and recharge the system.
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Overheating due to debris accumulation around the unit can also cause hot air output. Ensure adequate clearance around both the indoor and outdoor portions of your unit.
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Read our blog \"Troubleshooting Tips for Your Window AC\" to learn more

Efficiency and Cost Considerations

How Much Energy Does a Window AC Use?

Energy consumption varies significantly based on factors including BTU rating, Energy Star certification, age, and maintenance condition.

On average, a properly maintained window air conditioner will use between 500-1500 watts of electricity while running. To estimate costs, multiply this by your local electricity rate and average daily runtime.

Energy Star rated units generally reduce energy costs by approximately 30 percent compared to older models. This certification is particularly valuable for appliances like air conditioners that consume significant electricity.

To minimize energy usage:

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Choose the correct size unit for your space
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Maintain clean filters and components
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Use programmable features to avoid cooling empty rooms
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Supplement with fans to distribute cool air more efficiently
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Proper maintenance ensures your window ac unit operates at peak energy efficiency, which keeps energy costs down while maintaining optimal performance.

How Long Should a Window Air Conditioner Last?

With proper maintenance and care, a window air conditioner can last five to ten years. Several factors influence lifespan:

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Regular cleaning and maintenance significantly extend a unit's operational life. This includes filter cleaning, coil inspection, and ensuring proper drainage.
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Usage patterns affect longevity—units that run constantly will wear out faster than those used intermittently. Using programmable features to reduce unnecessary runtime can extend lifespan.
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Installation quality impacts performance and durability. Properly installed units experience less strain and structural stress.
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Environmental factors like exposure to extreme weather conditions or corrosive environments (such as coastal saltwater air) can accelerate wear and tear.
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To maximize your window AC's lifespan, follow the manufacturer's maintenance schedule and address small issues before they become major problems.

Health and Safety Considerations

Can Window ACs Affect Indoor Air Quality?

Window air conditioners can significantly impact indoor air quality, either positively or negatively depending on maintenance:

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Well-maintained units filter air to reduce indoor pollutants, providing cleaner air than simply opening windows in many urban or high-pollen environments.
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However, neglected units may harbor mold, bacteria, and accumulated dust that can be circulated into your living space. Regular cleaning is essential for preventing these issues.
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Older adults and individuals with respiratory conditions are particularly vulnerable to poor air quality, making proper maintenance even more critical in households with at-risk individuals.
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Regular inspection for mold in window air conditioners should be done to prevent health problems. Pay particular attention to the evaporator coils, drain pan, and air filter where moisture tends to accumulate.
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Are Window ACs Safe to Use in All Windows?

Not all windows are suitable for air conditioner installation:

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Window size and type matter significantly. Double-hung windows are ideal, while casement windows usually require special units designed specifically for that style.
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Structural integrity of the window frame must be sufficient to support the unit's weight. Rotting, damaged, or flimsy frames should be repaired before installation.
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Building restrictions and safety codes may limit installation options, particularly in apartments, condos, or historic buildings. Always check local regulations and lease agreements before installation.
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Ground-floor installations should include additional security measures to prevent both unit theft and unauthorized access through the partially open window.
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If you're unsure about your window's suitability, consult the manufacturer's specifications or have a professional assess your installation site.

Seasonal Considerations

How Do I Prepare My Window AC for Summer Use?

Before the summer heat arrives, it's important to test your window air conditioner for proper functionality:

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Start with a thorough cleaning of all accessible components, particularly the filter and exterior grilles. This ensures efficient operation from day one.
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Check the power cord and other electrical components for signs of wear or damage that might have occurred during storage. Replace damaged cords before use.
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Test the unit before hot weather arrives to ensure it's operating correctly. This gives you time to address any issues before you urgently need cooling.
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Clean or replace the air filter, which may have accumulated dust during storage. A clean filter is essential for efficient operation and good air quality.
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Inspect the seal around the unit and replace any damaged weatherstripping or insulation to maintain energy efficiency once installed.
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How Do I Store My Window AC During Winter?

Proper off-season storage helps extend your window air conditioner's lifespan:

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Clean all components thoroughly before storage, including filters, coils, and drain pans. This prevents mold growth and odors during storage.
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Run the fan-only mode for several hours after the final use to ensure all internal components are completely dry before storage.
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Cover the unit with a breathable cover if storing it in place, or use the original packaging if available when storing the unit indoors.
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Store in a dry, temperature-controlled environment when possible to prevent internal component damage from extreme temperatures or humidity.
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If storing in place, consider protection from ice and snow, which can damage external components and housing over the winter months.
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Understanding Window AC Energy Consumption Basics

Window AC units typically use between 500 and 1500 watts of electricity, depending on their size and efficiency rating. When compared to other cooling options, window air conditioners strike an impressive balance between cooling power and energy consumption. A standard 12,000 BTU window unit generally consumes between 1,000 to 1,500 watts during operation.

Breaking Down the Numbers: Hourly Energy Use

When examining exact figures, window ACs use an average of 0.43 kWh of electricity per hour during normal operation. This translates to approximately $0.05 to $0.10 per hour depending on your local electricity rates. Window air conditioners are designed to cycle on and off as needed, which helps manage their overall energy consumption rather than running continuously.

Daily Costs of Running a Window AC

The daily cost of operating a window air conditioner typically ranges between $1 to $2.50, making it an affordable cooling option for many households. These costs can vary based on:

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The unit's BTU rating
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Local electricity prices
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How many hours the unit runs
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The energy efficiency of your specific model
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Monthly Impact on Your Utility Bills

When used regularly throughout the summer, the median price of running a window AC is approximately $30 to $75 per month. This makes window units significantly more cost-effective than central air conditioning systems for cooling individual rooms or smaller living spaces. For those looking to cool just one room or a specific area of their home, window units present a clear advantage in terms of monthly energy costs.

Window AC vs. Portable Air Conditioners

Window AC units are notably more energy-efficient than portable air conditioners, often using up to half as much energy to cool the same space. This efficiency difference stems from:

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Better insulation against outside air
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More effective heat exchange processes
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Less energy wasted through exhaust hoses
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More direct cooling airflow patterns
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Portable AC units require venting through hoses that can allow hot air to re-enter the room, reducing overall efficiency and requiring more power to maintain the same temperature.

Window AC vs. Central Air Conditioning Systems

Central air conditioning systems are ideal for cooling entire homes but use significantly more energy than window units when you only need to cool specific areas. For cooling individual rooms or smaller apartments, window air conditioners provide targeted cooling without the excessive energy consumption of central HVAC systems.

A central AC system typically requires 3,500 watts or more to operate, which is significantly higher than the 500-1,500 watts used by window units. This difference can lead to substantial energy savings when cooling only selected spaces rather than an entire home.

Understanding BTU Ratings and Room Size

The British thermal unit (BTU) rating of your window air conditioner directly affects its energy usage and cooling capacity. For optimal efficiency:

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Small rooms (up to 150 sq ft): 5,000-6,000 BTU
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Medium rooms (150-250 sq ft): 6,000-8,000 BTU
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Large rooms (250-350 sq ft): 8,000-10,000 BTU
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Extra-large rooms (350-450 sq ft): 8,000-12,000 BTU
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Choosing the right size for your square footage ensures you're not wasting energy with an oversized unit or straining a unit that's too small. An appropriately sized window AC will cycle on and off efficiently rather than run continuously, saving energy and maintaining comfortable temperatures.

Decoding Energy Efficiency Ratio (EER)

The combined energy efficiency ratio (CEER) on an AC window unit's label provides crucial information about its efficiency. The higher the EER, the more efficient the unit. When shopping for a window air conditioner:

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Look for units with an CEER of 11 or higher
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ENERGY STAR certified models typically offer superior efficiency
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Each point increase in CEER can reduce energy consumption
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This ratio compares the cooling ability of the unit to the energy consumed, giving you a clear picture of how efficiently it will operate in your home.

The Real Cost: How Many Watts Does a Window AC Use?

Window air conditioners typically draw between 500 and 1,500 watts of power, with most standard units using around 900 watts during normal operation. This translates to:

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Small window AC (5,000-6,000 BTU): 500-600 watts
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Medium window AC (8,000-10,000 BTU): 700-1,000 watts
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Large window AC (12,000+ BTU): 1,000-1,500 watts
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When running for one hour, a typical window AC unit consumes about 0.9 kWh of electricity, making it a cost-effective cooling solution compared to central air systems which can use 3-4 kWh per hour.

Installation Requirements for Window Air Conditioners

Installing a window air conditioner is a relatively straightforward process that typically takes 25 to 35 minutes. To ensure proper installation, you'll need:

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Basic tools such as a screwdriver, level, pencil, and possibly a drill
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A window with at least 14 inches of vertical clearance
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A compatible window type (single- or double-hung windows work best)
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Support brackets for larger units
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Weather stripping for improved insulation
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Proper installation is essential for both energy efficiency and security, ensuring that your window AC unit operates at peak performance while remaining securely in place. Make sure to follow manufacturers guidelines for installing your particular unit.

Security Aspects of Window AC Installation

Window AC installations can create security risks if not installed properly. Most energy-efficient models now come with installation kits that include security measures without compromising the unit's efficiency. To enhance security:

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Use window locks or brackets designed for AC installations
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Consider support brackets that install from the inside
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Ensure the unit is properly secured to prevent removal from outside
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Check that the window cannot be opened further once the AC is installed
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Proper installation ensures both energy efficiency and home security, allowing you to enjoy cool air without compromising safety.

Maintenance That Improves Energy Efficiency

Regular maintenance keeps your window AC running efficiently and can extend its average lifespan of 8-10 years:

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Clean or replace air filters monthly during heavy use
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Remove dust and debris from coils seasonally
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Check and clean the condensate drain
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Ensure the unit remains level for proper operation
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Inspect seals around the unit before each cooling season
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These simple maintenance steps can improve energy efficiency by up to 15% and prevent the need for professional intervention in many cases.

How to Calculate Your Window AC's Energy Consumption

To determine your specific energy costs for running a window AC, use this simple formula:

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Wattage ÷ 1000 = kW
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kW × hours used = kWh
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kWh × electricity rate = daily cost
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For example, a 900-watt window AC running for 8 hours at $0.13 per kWh would cost approximately $0.94 per day (0.9 kW × 8 hours × $0.13).

Smart Features That Reduce Energy Usage

Modern window AC units often come equipped with energy-saving features that can dramatically reduce electricity consumption:

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Programmable timers to run the unit only when needed
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Sleep modes that gradually adjust temperature overnight
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Smart connectivity for remote temperature management
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Energy-saving modes that cycle the compressor to reduce consumption
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Smart thermostats that respond to room occupancy
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These features can help reduce your home's energy consumption by allowing precise control over when and how your window AC operates.

Optimal Temperature Settings for Energy Efficiency

Finding the sweet spot for your thermostat setting can significantly impact your window AC's energy consumption. The U.S. Department of Energy recommends setting your air conditioner to 78°F when you're home and higher when you're away. Each degree lower than this recommendation can increase energy consumption by approximately 3-5%.

Addressing Uneven Temperatures With Multiple Units

For larger homes or spaces with unique cooling challenges, multiple window AC units can provide more energy-efficient cooling than a single central system. This approach allows you to:

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Cool only the rooms currently in use
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Set different temperatures for different areas
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Address specific hot spots without overcooling other areas
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Create cooling zones based on occupancy patterns
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This targeted approach can significantly reduce overall energy consumption compared to cooling an entire home with central air.

Low-Cost Cooling Solutions for Renters

Window air conditioners are particularly valuable for renters who cannot make permanent changes to their living spaces. They offer:

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Easy installation without structural modifications
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Portable cooling that can move with you
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No need for professional installation in most cases
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Energy-efficient cooling without the need for ductwork
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A worthwhile investment with an average cost of $250 (typically ranging from $150 to $500)
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These advantages make window AC units an ideal solution for temporary living situations where energy efficiency remains important.

Combining Window AC With Other Cooling Strategies

To maximize energy efficiency, consider complementing your window air conditioner with other cooling approaches:

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Use extra fans to distribute cool air more effectively
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Close blinds or curtains during peak sunlight hours
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Seal other air leaks around windows and doors
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Add room insulation where possible
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Use a smart plug to monitor and control energy usage
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These complementary strategies can enhance the efficiency of your window AC unit and further reduce your overall energy consumption.

When Professional Installation Might Be Necessary

While most window AC units can be installed as a DIY project, certain situations may call for professional installation:

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Very large or heavy units (over 12,000 BTU)
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Installation in upper-story windows
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Windows with unusual dimensions or configurations
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Situations requiring electrical upgrades
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Special mounting requirements for security or structural reasons
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Professional installation typically costs $75-$200 but can ensure optimal positioning for energy efficiency and proper sealing against outside air.

Year-Round Energy Management with Window AC Units

Some window air conditioners offer heating capabilities for year-round climate control. When considering a window unit with heating functions:

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Look for heat pump technology for the most efficient operation
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Compare energy usage in both cooling and heating modes
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Consider the unit's efficiency in your specific climate
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Factor in the potential energy savings from not running central heat
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The ENERGY STAR Advantage for Window AC Units

ENERGY STAR certified window air conditioners must meet specific efficiency standards that make them more energy-efficient than standard models. These units typically:

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Use about 10% less energy than conventional models
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Often include additional energy-saving features
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Meet strict requirements for energy performance
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Save an average of $70 per year on cooling costs
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Looking for the ENERGY STAR label is one of the simplest ways to ensure you're purchasing an energy-efficient window AC unit.

Making the Final Decision: Is a Window AC Energy Efficient?

The verdict is clear: window air conditioners are indeed energy-efficient cooling solutions when properly sized, installed, and maintained. For cooling specific areas of your home, they typically use less energy than central air conditioning and significantly less than portable air conditioners.

With energy consumption between 500-1500 watts and monthly costs ranging from $30-$75, window AC units represent an affordable, energy-efficient option for targeted cooling. Their flexibility, relatively low cost, and improved energy efficiency ratings make them an excellent choice for many cooling scenarios.

Window AC Units: The Smart Choice for Efficient Cooling

Window air conditioners strike an ideal balance between cooling performance, energy consumption, and cost. Whether you're looking to cool a single room, supplement an existing system, or find an affordable solution for a small living space, today's window AC units offer impressive energy efficiency that can help you stay comfortable while keeping your energy bills manageable.

By understanding how much electricity a window AC uses and following the efficiency tips outlined in this guide, you can make informed decisions about your home cooling strategy and enjoy comfortable indoor temperatures with minimal energy expense. With proper selection and use, a window AC can be one of the most energy-efficient cooling options available for your home.

At Windmill, we're committed to creating energy-efficient window AC units that combine smart technology with thoughtful design. Our window air conditioners are ENERGY STAR certified, featuring optimal BTU ratings for various room sizes while maintaining minimal energy consumption. Windmill AC units are engineered with user-friendly installation, whisper-quiet operation, and advanced filtration systems that improve indoor air quality while cooling your space effectively. With sleek, modern aesthetics that complement any home decor and intuitive controls for precise temperature management, Windmill window ACs deliver exceptional cooling performance without excessive energy use. Experience the perfect balance of comfort, efficiency, and style with Windmill's innovative window air conditioning solutions.

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Living with pets brings immeasurable joy, but it also comes with some less-than-pleasant side effects. From mysterious odors that seem to permeate every fabric to the constant battle against fur tumbleweeds, pet ownership presents unique challenges for maintaining a clean, fresh-smelling home. And for the millions who experience pet allergies, these furry companions can trigger uncomfortable symptoms that impact daily life.

If you’ve been wondering whether an air purifier might be the solution to your pet-related air quality issues, you’re in the right place. We’ll dive into how these devices tackle pet dander, allergens, and those persistent odors—sharing practical advice for choosing and using the right air purifier to make your home more comfortable for everyone.

Whether you’re dealing with mild allergies or searching for ways to reduce that unmistakable “pet home” smell, understanding how air purifiers work with pet-specific challenges can help you breathe easier and enjoy your furry friends without compromise.

Understanding Pet-Related Indoor Air Quality Issues

Before exploring solutions, let's understand exactly what we're dealing with when it comes to pets and indoor air quality. The challenges go beyond just visible fur—tiny particles and compounds create both allergy triggers and odor issues.

What are Pet Odors? Common Pet Odor Sources

Pet odors are those unmistakable smells that can linger in your home, emanating from your furry friends. These odors can originate from various sources, including your pet’s fur, skin, saliva, urine, and feces. Factors such as the type of pet, their diet, and grooming habits can all influence the intensity and type of odors you experience.

For instance, dogs and cats produce natural oils that, while beneficial for their skin and coat, can develop distinct smells when mixed with dirt or bacteria. Additionally, pet accidents and litter boxes can contribute to the overall odor profile of your home. These smells can be more than just a nuisance; they can exacerbate allergies and respiratory issues for sensitive individuals.

Air purifiers equipped with activated carbon filters are particularly effective at neutralizing these odors. The activated carbon works by adsorbing odor molecules, preventing them from circulating through your home and significantly improving indoor air. For pet owners, investing in an air purifier with a robust activated carbon filter can make a noticeable difference in maintaining a fresh-smelling and healthy living environment.

The Science Behind Pet Allergies

Pet allergies aren't typically triggered by fur but by proteins found in pet saliva, urine, and skin cells (dander). These microscopic allergens are lightweight enough to float through your home's air for hours before settling on surfaces.

When inhaled or contacting skin, these particles trigger the immune system of sensitive individuals to release histamines, causing symptoms like sneezing, itchy eyes, and congestion.

Pet allergens are particularly challenging because they're sticky, clinging to surfaces for months, and extremely small (typically 2.5 microns or smaller)—easily bypassing the body's natural filtration systems when breathed in.

How Air Purifiers Work

Understanding the basics of air purification technology helps explain how these devices address pet-related concerns in your home.

Air Purification Technology Basics

Air purifiers operate by pulling room air through filters that capture pollutants, then releasing cleaned air back into your space. This continuous circulation process gradually reduces airborne contaminants.

Quality air purifiers use fans to move air through their filtration systems, with fan speed determining both cleaning efficiency and noise level. Higher speeds clean more efficiently but generate more sound.

An air purifier's effectiveness depends on its clean air delivery rate (CADR) and the types of filters it uses. Different filtration technologies target specific concerns—from larger particles like pet hair to microscopic allergens and odor-causing compounds.

Types of Air Purifier Filters

HEPA Filters

High Efficiency Particulate Air (HEPA) filters are the gold standard for capturing pet dander. True HEPA filters remove at least 99.97% of particles as small as 0.3 microns—effectively trapping microscopic pet allergens. For allergy sufferers, a true HEPA filter is essential.

Activated Carbon Filters

While HEPA filters capture particles, they can’t trap odor-causing gases. Carbon filters contain specially treated carbon with a porous structure that absorbs odor molecules and volatile organic compounds. For pet odor control, substantial activated carbon filtration is crucial. When selecting air purifiers, it's important to consider replacement filters, detailing various filter types, including HEPA and activated carbon filters, and their respective replacement schedules.

Pre-Filters

Quality air purifiers include a pre-filter to capture larger particles like pet hair before they reach specialized filters. This protects main filters from clogging too quickly, extending their lifespan. Many feature washable pre-filters for reduced maintenance costs.

Additional Technologies

Some air purifiers include supplementary features like UV-C light to neutralize bacteria or ionizers to help particles clump for easier filtration. These should complement, not replace, HEPA and carbon filtration for pet-related concerns. The effectiveness of a washable carbon filter as part of multi-stage filtration systems is notable for absorbing odors and VOCs, and its practicality of being washable reduces the need for frequent replacements.

Do Air Purifiers Help with Pet Dander?

Pet dander is often the primary concern for those experiencing allergic reactions to animals—but can air purifiers really make a difference?

What is Pet Dander?

Pet dander consists of microscopic skin flakes shed by animals with fur or feathers. Unlike visible pet hair, dander particles typically measure just 2.5 microns or smaller—about one-tenth the width of a human hair. These lightweight particles can remain suspended in air for hours.

Dander contains specific proteins that trigger allergic reactions in sensitive individuals. These particles show remarkable durability, remaining potent for months and easily becoming airborne again during activities like vacuuming or sitting on furniture where dander has accumulated.

How HEPA Filters Capture Pet Dander

HEPA filters effectively capture pet dander through their densely packed fibers arranged in a maze-like structure. These filters trap particles through multiple mechanisms:

Larger dander particles (around 2.5 microns) are captured through direct impact with filter fibers. Medium-sized particles are caught when they can't navigate the tight turns around fibers. The smallest particles get trapped when they bounce in the airstream and eventually contact fibers through diffusion.

This multi-layered approach allows true HEPA filters to capture 99.97% of particles as small as 0.3 microns—well within the size range of pet dander. Advanced models can capture particles down to 0.1 microns for exceptional protection.

Research and Testing Results

Studies consistently show that tested air purifiers with high efficiency particulate air filtration significantly reduce airborne pet dander. In controlled environments, properly sized units can remove up to 99% of airborne pet allergens within 30 minutes.

Research published in the Journal of Allergy and Clinical Immunology found HEPA air purifiers reduced cat allergen levels in bedrooms by an average of 75%, correlating with improved symptoms in allergic patients.

Effectiveness depends on factors including the air purifier's CADR, room size, and number of pets. Consistent operation yields better results than intermittent use. For maximum benefit, place air purifiers where pets spend the most time and where allergic individuals sleep.

Do Air Purifiers Help with Pet Allergies?

For the millions who experience pet allergies but don't want to part with their furry companions, air purifiers offer hope for coexistence—but how effective are they really?

Common Pet Allergy Symptoms

Pet allergies cause symptoms ranging from mild to severe. Common reactions include sneezing, runny nose, itchy or watery eyes, and sinus congestion. Many people also develop skin symptoms like hives or rashes after contact with animals.

For those with asthma or severe allergies, pet allergens can trigger wheezing, difficulty breathing, chest tightness, and persistent coughing. Some experience chronic symptoms resembling a perpetual cold. Severity varies based on individual sensitivity, allergen concentration, and pet species—with cat allergies typically causing more severe reactions than dog allergies.

Air Purifiers as Part of Allergy Management

HEPA air purifiers effectively reduce airborne allergens but work best as part of a comprehensive strategy. They should complement regular cleaning, pet hair/dander free zones (especially bedrooms), and consistent pet hair grooming.

For optimal results, run your air purifier continuously in spaces where you spend the most time and where allergies are most troublesome. Many allergy sufferers report significant improvement when using air purifiers in bedrooms, creating a sanctuary for symptom-free sleep.

Remember that air purifiers remove airborne allergens but cannot extract allergens from surfaces. Maintaining regular cleaning alongside air purification provides the most effective approach for managing pet allergies.

Do Home Air Purifiers Help with Odors?

That distinctive \"pet home\" smell can be persistent despite regular cleaning—here's how air purifiers tackle the molecular challenge of pet odors.

How Carbon Filtration Works on Odors

Activated carbon filters excel at odor removal through adsorption—trapping odor molecules at the molecular level. Unlike HEPA filters that physically block particles, carbon works through chemical attraction, making it uniquely effective against pet smells.

The effectiveness comes from carbon's structure after \"activation,\" which creates millions of microscopic pores with enormous surface area. A single gram of activated carbon can have a surface area exceeding 3,000 square meters.

When air passes through these filters, odor molecules bond to the carbon's porous surfaces, effectively removing them from your home's air. For pet odor control, both quantity and quality of carbon matter. Premium air purifiers for pet owners contain substantial carbon filters, sometimes with additives targeting specific pet odors.

Beyond Carbon: Additional Odor-Fighting Technologies

While activated carbon is the primary odor defense, some air purifiers include supplementary technologies for enhanced control.

UV light helps break down odor-causing compounds from biological sources by damaging their chemical bonds, neutralizing odors at the source. Some models feature pre-filters infused with baking soda or other odor-neutralizing compounds. Others use photocatalytic oxidation to convert volatile organic compounds into harmless substances.

These technologies are most effective when paired with substantial filtration, creating a multi-pronged approach to address the complex mixture of compounds in pet odors.

Managing Expectations for Odor Control

Air purifiers effectively reduce pet odors but have limitations. They excel at removing airborne odor molecules but cannot address odors embedded in carpets or furniture.

For comprehensive management, combine air purification with regular cleaning of pet bedding, prompt accident cleanup, and occasional deep cleaning of carpets. Air purifiers work continuously to capture odor molecules as they're released, preventing accumulation.

The most noticeable improvements typically occur after several days of continuous operation. Visitors often notice the difference immediately, even when residents have become nose-blind to the improvement.

Choosing the Right HEPA Air Purifier for Pet Owners

With countless options on the market, finding the ideal air purifier for your pet-specific needs requires understanding key features and specifications.

Key Features for Pet Households

Combine HEPA and Carbon Filters

Effective air purifiers for pets combine HEPA filtration for dander removal with substantial activated carbon for odor control. Look for models specifying \"True HEPA\" (not \"HEPA-type\"). These HEPA filters can remove 99.97% of airborne particles as small as 0.3 microns.

For odor control, check the amount of carbon filtration. Models with several pounds of carbon or specialized pet odor formulations typically perform better.

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Coverage Area - Select an air purifier rated for a space slightly larger than your room. This allows for efficient operation at lower, quieter fan speeds while maintaining effective air cleaning.
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Filtration Efficiency - Premium air purifiers that capture particles down to 0.1 microns provide enhanced protection against the smallest pet allergens, offering meaningful improvements for severe allergy sufferers.
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Pre-Filter Quality - A durable, washable pre-filter is essential for capturing pet hair before it reaches main filters. This extends filter life and reduces maintenance costs.
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Important Specifications to Consider

Clean Air Delivery Rate (CADR)

CADR ratings indicate how quickly an air purifier cleans air in a specified room size. For pet owners, prioritize high CADR ratings for dust, which correlates with dander removal capability.

Noise Levels

Air purifiers vary in noise levels, so consider how loud the unit is, especially if it will be used in bedrooms or quiet spaces. Continuous operation provides best results. For bedrooms, choose units operating at 30 decibels or less on low settings—about the sound of a whispered conversation.

Filter Replacement Costs

Consider long-term filter replacement expenses. Filters need to be regularly replaced for air purifiers to function effectively. Understanding the cost and maintenance of filters is essential for ensuring the air purifiers remain effective over time. Some models have separate filters replaceable individually as needed, potentially reducing costs. Typical replacement intervals are 6-12 months for HEPA filters and 3-6 months for washable carbon filters in pet households.

Energy Efficiency

For continuous operation, energy consumption matters. Energy Star certified models typically use about 40% less energy than standard units.

Smart Features and Convenience

Several smart features make air purifiers more convenient for pet owners:

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Auto Mode - Sensors detect air quality and automatically adjust fan speed. Look for air purifiers with multiple fan speeds and settings for better control and noise adjustment. When pets kick up dander during play or bring in outdoor allergens, auto mode increases filtration without manual adjustment.
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Indoor Air Quality Indicators - Some air purifiers offer app connectivity to monitor and control air quality remotely. Visual displays show a room's air quality, helping you monitor when additional cleaning might be needed. Advanced models differentiate between particle pollution (dander) and gaseous pollutants (odors).
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Filter Change Indicators - These alerts ensure you replace filters at optimal times—particularly valuable in pet households where filters saturate faster.
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Air Purifier Placement

When it comes to maximizing the effectiveness of your air purifier, placement is key. Here are some practical tips to ensure your air purifier performs at its best:

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Central Location: Place your air purifier in a central location, such as a living room or bedroom, to maximize its coverage area. This helps ensure that the clean air is distributed evenly throughout the space.
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Avoid Walls and Corners: Position the air purifier away from walls or corners, as these can obstruct airflow and reduce the unit’s effectiveness. Keeping it at least 3-4 feet away from any walls or furniture ensures proper air circulation.
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Flat Surface: Ensure the air purifier is placed on a flat, stable surface, such as a table or the floor. This prevents it from tipping over and ensures it operates efficiently.
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Humidity Considerations: Avoid placing the air purifier in humid or damp environments, as excessive moisture can affect its performance and longevity. Instead, choose a dry area where the air purifier can function optimally.
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By following these placement tips, you can enhance the performance of your air purifier, ensuring it effectively removes pet dander, odors, and other airborne pollutants from your home.

The Best Air Purifiers for Different Home Sizes

The right air purification approach varies depending on your living space and how your pets use it.

Solutions for Small Spaces

In apartments, small bedrooms, or offices under 300 square feet where pets spend time, compact air purifiers can effectively manage pet allergens and odors without overwhelming the space.

For these smaller areas, look for models with a CADR rating of at least 100-150, which provides sufficient air cleaning power while maintaining a small footprint. Desktop or nightstand models work well in these environments but verify they include both HEPA and carbon filtration despite their smaller size.

Strategic placement becomes especially important in small spaces. Position your air purifier where airflow isn't obstructed and ideally between the pet's favorite resting area and where human occupants spend most of their time. This intercepts pet allergens and odors before they reach you, maximizing the unit's effectiveness despite space limitations.

Air Purification for Large Rooms

Open floor plans, great rooms, and larger spaces over 500 square feet present different challenges for pet-related air purification. In these environments, air circulation becomes crucial for effective cleaning.

Choose air cleaners with CADR ratings of 300+ for these larger spaces, ensuring they can turn over the air volume multiple times per hour. Models with multidirectional air intake and output facilitate better whole-room circulation, reaching distant corners where pet allergens might otherwise accumulate.

In particularly large spaces, consider using two medium-sized air purifiers positioned at opposite ends rather than one large unit. This approach creates a cross-flow effect that catches more airborne pet allergens and provides redundancy if one unit needs maintenance. Place units near areas with the highest pet activity—like their beds or favorite lounging spots—to capture pollutants at their source.

Whole-Home Air Purification Options

For multi-pet households or homes where pets have access to most areas, whole home air purifiers provide comprehensive coverage beyond what portable units can achieve.

HVAC-integrated systems that incorporate high-MERV or HEPA-grade filtration can help manage pet allergens throughout your entire home. These systems work with your existing heating and cooling equipment, purifying air as it circulates through your ductwork.

While typically more expensive initially, whole-home systems offer several advantages: silent operation, no floor space requirements, and simultaneous coverage for all rooms. They're particularly valuable for allergy sufferers in homes with multiple pets or where pets have unrestricted access to most living spaces.

Real-World Testing and Effectiveness

Understanding how air purifiers perform under actual conditions with pets helps set realistic expectations for improvement.

Testing Methodology

Professional evaluations of air purifiers for pet-related issues typically examine performance across several key metrics:

Particle Reduction Testing

Using specialized equipment that counts airborne particles, testers measure the concentration of different-sized particles before and after running an air purifier. For pet-specific concerns, particles in the 0.3-2.5 micron range (the size of most pet dander) receive particular attention. Effective units should reduce these particles by at least 95% within an hour of operation.

Odor Elimination Assessment

While more subjective, odor testing typically involves introducing standardized pet-related odors into a controlled environment and measuring the time required for different air purifiers to reduce odor to undetectable levels. Human evaluators often rate the remaining odor intensity at set intervals.

Allergen-Specific Capture

Some advanced testing uses immunoassay techniques to specifically measure reductions in pet allergens like Fel d 1 (the primary cat allergen) or Can f 1 (a major dog allergen). This provides more targeted data about allergen reduction beyond general particle counts.

Long-Term Performance

The most valuable testing evaluates performance over time, assessing how well units maintain effectiveness as filters trap pet hair and dander. This reveals whether performance degrades rapidly or remains consistent between recommended filter changes.

Performance Results

Real-world testing consistently demonstrates that quality air purifiers make meaningful improvements in homes with pets, though results vary based on specific models and home environments.

Particle Reduction

Independent testing shows that air purifiers with HEPA filtration typically reduce airborne pet dander by 90-99% within the first hour of operation in a closed room. After 24 hours of continuous operation, the cumulative effect can reduce airborne allergen concentrations by up to 99.9%.

However, performance drops significantly when filters become saturated or when doors and windows are frequently opened, introducing new allergens. This highlights the importance of proper maintenance and continuous operation.

Odor Control Effectiveness

Tests reveal considerable variation in odor control capabilities between models. Units with substantial activated carbon (typically 5+ pounds) show the most consistent performance, reducing detectable pet odors by 70-80% within three hours. Models with minimal carbon filtration may initially reduce odors but show rapid performance decline as carbon quickly saturates.

Allergen-Specific Testing

Studies focusing specifically on pet allergens find that quality air purifiers can reduce airborne allergen concentrations enough to provide clinical benefits for many allergy sufferers. One notable study found that using HEPA air purifiers reduced cat allergen levels by 75%, correlating with significant symptom improvement in cat-allergic participants.

Testing also demonstrates that consistent, 24/7 operation delivers dramatically better results than intermittent use, particularly for managing the continuous allergen shedding that occurs in pet households.

Benefits of Air Purifiers for Pet Owners

Air purifiers offer a range of benefits for pet owners, making them a valuable addition to any home with furry companions. Here are some of the key advantages:

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Improved Indoor Air Quality: Air purifiers can effectively remove pet hair, dander, and odors from the air, significantly improving indoor air quality. This can help reduce allergy symptoms and create a healthier living environment.
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Reduced Pet Odors: Air purifiers with activated carbon filters are particularly effective at neutralizing pet odors. The activated carbon adsorbs odor molecules, leaving your home smelling fresh and clean.
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Relief from Pet Allergies: For those with pet allergies, air purifiers can provide much-needed relief. By removing allergens and irritants from the air, they help alleviate symptoms such as sneezing, itchy eyes, and congestion.
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Protection from Pet-Borne Illnesses: Air purifiers can also remove bacteria, viruses, and other microorganisms from the air, protecting you and your family from potential pet-borne illnesses.
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Reduced Pet Hair: Air purifiers can capture pet hair from the air, reducing the amount that settles on surfaces and furniture. This makes cleaning easier and helps maintain a tidy home.
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Overall, air purifiers can make a significant difference for pet owners, providing improved indoor air quality, reduced pet odors, and relief from allergies and respiratory issues. Investing in a quality air purifier can help you enjoy the companionship of your pets without compromising on a clean and healthy home environment.

Complementary Strategies for Pet Owners

The best air purifiers work best as part of a comprehensive approach to managing pet-related indoor air quality issues.

Regular Home Cleaning Practices

Pair your air purifier with effective cleaning routines specifically designed for pet households:

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Vacuum floors and furniture at least twice weekly using a vacuum with a HEPA filter to prevent recirculating captured dander. Focus on areas where pets lounge most frequently.
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Launder pet bedding weekly in hot water (130°F or higher) to kill dust mites and remove accumulated allergens.
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Use microfiber cloths for dusting rather than feather dusters, which can scatter allergens back into the air. Dampen cloths slightly for maximum particle capture.
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Consider replacing wall-to-wall carpeting with hard flooring in at least some rooms, as carpets harbor significant amounts of pet allergens that can be difficult to remove completely.
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Keep pets off furniture when possible, or use washable covers on their favorite spots that can be laundered regularly.
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Brush pets outdoors regularly to reduce the amount of hair and dander they shed inside your home.
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Additional Air Quality Improvements

Beyond cleaning and air purification, consider these complementary approaches:

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Maintain optimal humidity levels between 40-50%. Extremely dry air can increase skin flaking (including pet dander), while excessive humidity promotes dust mite growth and can contribute to musty odors.
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Create pet-free zones, particularly in bedrooms of family members with allergies, to provide allergen-reduced spaces for sleeping and recovery.
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Use allergen-proof covers on mattresses and pillows to prevent pet dander from embedding in bedding when pets occasionally access these areas.
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Improve ventilation strategically—opening windows can help reduce indoor air pollutant concentrations but may also introduce outdoor allergens. Consider timing ventilation for low pollen count days.
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Consider professional steam cleaning of upholstery and carpets quarterly in homes with allergy sufferers, as the heat helps denature protein allergens that trigger symptoms.
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The best air purifiers offer significant benefits for pet parents, effectively reducing airborne dander, allergens, and odors when chosen and used appropriately. The most effective models combine true HEPA filtration with substantial activated carbon, addressing both the particle and odor challenges that pets introduce to indoor environments.

While no air purifier eliminates all pet-related indoor air quality issues, quality units make a noticeable difference, especially when combined with regular cleaning and smart pet management strategies. For those who love their pets but struggle with allergies or odors, today's best air purifiers provide a valuable tool for creating a healthier, fresher home environment without sacrificing the joy of pet companionship.

About Windmill Air

At Windmill, we believe comfort shouldn't be complicated. We're making air quality care simple, beautiful, and eco-friendly.

Our best air purifiers combine sleek design with smart features and effective filtration systems that address pet-related concerns while enhancing your home's aesthetic. Windmill has reimagined air quality management to be easier to use, more efficient, and quieter than traditional models.

With variants designed to fit many room sizes, you'll find the perfect air purification solution for any space in your home. Our products enhance your comfort while respecting the environment—using energy-efficient operation and thoughtful touches like auto-dimming displays and washable pre-filters.

From studio apartments to home offices, Windmill air purifiers are designed to help create your perfect sanctuary—even with furry friends in the mix.

Frequently Asked Questions (FAQs)

Does an air purifier remove pet odors? Yes, air purifiers with activated carbon filters effectively remove pet odors from the air. The carbon absorbs odor molecules, preventing them from circulating through your home.

Are air purifiers worth it if you have pets? Air purifiers are definitely worth the investment for owners, especially those with allergies or sensitivity to odors. They continuously remove pet dander, allergens, and odors from the air, creating a healthier home environment.

Do air purifiers really work for pet allergies? Yes, air purifiers with HEPA filters can remove up to 99.97% of airborne pet allergens. Studies show they can significantly reduce allergy symptoms when used consistently as part of an overall allergy management strategy.

How do you get rid of pet smell in the air? The most effective approach is using an air purifier with activated carbon filters alongside regular cleaning of pet bedding and living areas. For immediate relief, ensure good ventilation and treat fabrics where odors tend to linger.

What air filter is best for pet dander? HEPA filters are the most effective for capturing pet dander, removing 99.97% of particles as small as 0.3 microns. Look for sealed systems that prevent captured dander from leaking back into your home.

How do you filter pet dander? Use air purifiers with HEPA filters in rooms where pets and people spend the most time. Complement this with regular vacuuming using HEPA-filtered vacuums and washing pet bedding weekly in hot water.

Should I get an air purifier if I have pets? If you have pets, an air purifier is a worthwhile investment for maintaining better indoor air quality. It helps reduce allergens, control odors, and minimize the impact of pet dander on your home environment.

","2025-05-12T08:42:13Z",[],{"_4303":4456,"_462":4457},"eyJsYXN0X2lkIjo1NjI2NTgzNzc4OTAsImxhc3RfdmFsdWUiOjE3NDY2NjM3ODIwMDAsIm9mZnNldCI6MTF9",{"_88":4458,"_32":4459,"_413":4460,"_4283":4461,"_61":4462,"_147":4468,"_4291":4469,"_4293":4470,"_450":4471},"Breath Easier: Hidden Asthma Triggers in Your Home","gid://shopify/Article/562658377890","breath-easier-hidden-asthma-triggers-in-your-home","Managing asthma can feel like a full-time job, especially when your home might be hiding the very triggers causing those troublesome symptoms. Whether it's the dust that collects on your shelves or...",{"_32":4463,"_73":4464,"_62":4465,"_75":4466,"_71":4467},"gid://shopify/ArticleImage/112553623714","https://cdn.shopify.com/s/files/1/0418/1796/4706/articles/Windmill_Air_Purifier_5adb96f7-35d9-4a53-bb22-7983591fb955.webp?v=1747039614","Air Purifier",976,432,{"_88":4274,"_413":4273},"

Managing asthma can feel like a full-time job, especially when your home might be hiding the very triggers causing those troublesome symptoms. Whether it's the dust that collects on your shelves or the mold hiding in damp corners, these everyday elements can turn your sanctuary into a source of wheezing, coughing, and breathing difficulties. But here's the good news: identifying these sneaky triggers is the first step toward creating a home environment where you and your family can breathe easier.

What Are Asthma Triggers?

Asthma triggers are specific substances, conditions, or activities that can set off your asthma symptoms or cause an asthma attack. When your airways encounter these triggers, they can become inflamed, narrow, and filled with mucus—making breathing difficult and triggering coughing, wheezing, or chest tightness.

What makes managing asthma challenging is that triggers vary widely from person to person. What causes one person's asthma to flare might not affect someone else at all. And while outdoor triggers like pollen and air pollution often get attention, the air quality triggers inside your home can be even more impactful on asthma since that's where you likely spend most of your time.

Most Common Asthma Triggers in the Home

House Dust Mites

Dust mites are tiny bugs—too small to see with the naked eye—that thrive in your mattresses, pillows, upholstered furniture, and carpets. These microscopic creatures feed on dead skin cells and flourish in warm, humid environments. While that mind sound alarming to think about, they are a normal part of every day life.

When people with dust mite allergies inhale dust containing these tiny bugs' body parts and droppings, their immune system can trigger asthma symptoms. Particularly high concentrations tend to gather in bedding, where we spend roughly one-third of our lives.

Pro tip: Washing bedding weekly in hot water (130°F) kills dust mites and removes their allergens.

Mold

Mold loves damp, dark spaces, making bathrooms, basements, and areas with water leaks prime real estate. When mold spores become airborne, they can trigger asthma attacks in sensitive individuals.

The problem with mold is that it often grows in places you don't see every day—behind wallpaper, under sinks, or inside air ducts—allowing colonies to develop before you notice them. This hidden growth means you might be breathing in mold spores without realizing it's triggering your asthma.

Pets and Asthma

We love our pets, but for many people with asthma, animal allergens can trigger symptoms and even attacks. It's not actually the fur that's the problem—it's proteins found in pet dander, saliva, urine, and feces that cause allergic reactions.

These allergens are incredibly lightweight and can remain suspended in the air for long periods. They also stick to walls, clothing, and other surfaces, making them difficult to completely eliminate even when the pet isn't present in the room.

Pests

Cockroaches, mice, and other pests leave behind irritants that can become airborne and trigger asthma. Studies have shown that cockroach allergens, in particular, are a significant asthma trigger, especially in urban environments.

These allergens are extremely potent—even small amounts can cause reactions in sensitive individuals. And because pests often hide in walls, under appliances, or in cluttered areas, you might not even realize you have an infestation.

Identifying Your Specific Asthma Triggers

Everyone's asthma is different, which means your personal trigger profile is unique. Finding out exactly what makes your asthma worse is key to creating an effective management strategy.

Track Your Symptoms like Asthma Attacks

Start keeping an asthma diary to log when and where your symptoms occur. Note what you were doing, where you were, and any environmental factors that might have played a role. After a few weeks, patterns often emerge that can help pinpoint your triggers.

For example, if your asthma consistently worsens at night in your bedroom, dust in your bedding might be the culprit. Or if symptoms flare while cleaning, chemical irritants could be triggering your asthma.

Consider Allergy Testing

If your detective work doesn't yield clear answers, allergy testing can help identify specific triggers. Your doctor can perform skin tests or blood tests to determine exactly what you're allergic to, which can guide your trigger avoidance strategy.

Knowing precisely what triggers your asthma allows you to focus your energy and resources on addressing those specific factors, rather than making unnecessary changes.

Strategies to Reduce Asthma Triggers in the Home

Now that you understand what might be triggering your asthma, let's talk about practical solutions to create a more breathable home environment.

Winning the Battle Against Dust Mites

These mites may be microscopic, but there's plenty you can do to minimize their impact:

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Encase mattresses and pillows in allergen-proof covers to create a barrier between you and dust mites
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Wash bedding weekly in hot water (130°F) to kill mites and remove allergens
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Replace down-filled pillows with washable, hypoallergenic alternatives
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Reduce clutter that collects dust, particularly in the bedroom
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Choose hard surface flooring over carpeting when possible
\n

Managing Moisture and Mold

The key to preventing mold is controlling moisture in your home:

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Use exhaust fans in bathrooms and kitchens to remove humid air
\n
\n
Fix water leaks promptly to prevent damp environments where mold thrives
\n
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Keep indoor humidity between 30-50% using a dehumidifier if necessary
\n
\n
Clean shower curtains and bathroom surfaces regularly with mold-inhibiting solutions
\n
\n
Ensure proper ventilation throughout your home, especially in typically damp areas
\n

A humidity meter (hygrometer) costs just a few dollars but can help you monitor moisture levels and alert you to reduce indoor humidity levels that promote mold growth.

Creating a Pet-Friendly Strategy

If you're allergic to your pets but can't bear to part with them:

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Designate pet-free zones, particularly bedrooms, to create allergen-free spaces
\n
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Vacuum frequently with a HEPA-filtered vacuum to remove pet dander
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Bathe pets weekly to reduce the amount of allergens they shed
\n
\n
Use high-efficiency air filters in your central HVAC systems and quality indoor air purifiers to help keep air clean
\n
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Consider hard-surface flooring instead of carpet, which traps pet allergens
\n

Remember, pet allergens can linger for months, so consistency with these measures is essential for reducing exposure.

Improving Your Indoor Air Quality

The air you breathe inside your home can be purified with these approaches:

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Install high-efficiency air filters in your heating and air conditioning systems
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\n
Use air purifiers with HEPA filtration in key living areas and bedrooms
\n
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Ventilate your home regularly by opening windows when outdoor air quality is good — not when outdoor allergens like pollen are high
\n
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Keep windows closed during high pollen seasons or when outdoor pollution is high
\n
\n
Choose fragrance-free, low-VOC products for cleaning and home maintenance
\n

Air purifiers with HEPA filters can remove up to 99.97% of airborne particles, including many standard asthma triggers like dust allergens, pet dander, and pollen.

Pest Control the Asthma-Friendly Way

Keep pests and their allergens at bay with these strategies:

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Store food in airtight containers to eliminate pest access to food sources
\n
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Clean up crumbs and spills immediately to avoid attracting pests
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Seal cracks and crevices where pests might enter your home
\n
\n
Use integrated pest management techniques that minimize the use of chemical pesticides
\n
\n
Remove garbage regularly from your home
\n

If you need to use pesticides, choose lower-toxicity options and ensure good ventilation to minimize respiratory irritation.

Creating an Asthma-Friendly Home Environment

Building an asthma-friendly home isn't just about eliminating triggers—it's about creating new habits that keep your air clean and your breathing easy.

Your Asthma Action Plan

Work with your doctor to develop a written asthma action plan that includes:

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Steps to reduce exposure to your specific triggers
\n
\n
Early warning signs to watch for
\n
\n
When and how to adjust your medications
\n
\n
When to seek emergency care
\n

Having a clear plan helps you stay proactive rather than reactive in managing your asthma.

Seasonal Considerations

Different seasons bring different challenges for people with asthma:

\n
Spring and summer: Close windows during high pollen days and use air conditioning with clean filters
\n
\n
Fall: Be aware of mold from fallen leaves and seasonal changes
\n
\n
Winter: Monitor indoor humidity levels when heating systems are running
\n

Tracking air quality forecasts and planning your activities accordingly can help you stay ahead of seasonal triggers.

Improve Air Quality with Windmill Air

At Windmill Air, we understand the challenges that poor indoor air quality presents for people with asthma. Our air purifiers are designed with advanced filtration technology that captures up to 99.97% of airborne particles as small as 0.3 microns—including some of the most standard asthma triggers like dust allergens, pet dander, and mold spores.

Our units feature whisper-quiet operation, making them perfect for bedrooms and living spaces where clean air matters most. With smart features like air quality monitoring and filter replacement indicators, maintaining healthy air in your home has never been easier. Because when it comes to managing asthma triggers, prevention truly is the best medicine.

Frequently Asked Questions

What triggers asthma in the house?

Common household asthma triggers include dust mites in bedding and furniture, pet dander, mold growing in damp areas, cockroach droppings, chemical irritants from cleaning products, and secondhand smoke. Indoor air pollutants like nitrogen dioxide from gas stoves and volatile organic compounds from new furnishings can also trigger asthma symptoms.

What is the 4 4 4 rule for asthma?

The 4 4 4 rule for asthma is a breathing technique to help during mild asthma symptoms: breathe in for 4 seconds, hold for 4 seconds, and exhale for 4 seconds. This pattern helps slow breathing, reduce anxiety during an episode, and may help prevent escalation to a full asthma attack, though it should complement rather than replace prescribed medications.

How do you clear your house of asthma triggers?

Clear your house of asthma triggers by using HEPA air purifiers, washing bedding weekly in hot water, controlling humidity between 30-50%, using allergen-proof mattress and pillow covers, vacuuming with a HEPA vacuum regularly, and reducing clutter. Additionally, fix water leaks promptly, use exhaust fans in bathrooms and kitchens, switch to fragrance-free cleaning products, and maintain proper ventilation throughout your home.

What are the 5 most common triggers of asthma?

The five most common asthma triggers are allergens (dust, pollen, pet dander, mold), respiratory infections, physical activity, air pollutants (smoke, strong odors, chemicals), and weather changes (cold air, humidity). These triggers can cause airway inflammation, muscle tightening, and mucus production that lead to asthma symptoms and attacks.

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Indoor air quality might not be on your mind every day, but it significantly impacts your health and comfort at home. From reducing allergens to capturing harmful bacteria and viruses, understanding what makes a High Efficiency Particulate Air (HEPA) filter special can help you breathe easier in your environment surround by viruses and other contaminants.

This guide covers what HEPA air filters are, how they work, and why they matter for improving indoor air quality. We'll explain how these remarkable filters transform contaminated air into clean, fresh air.

Key Takeaways

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Superior Filtration Power: HEPA filters capture particles floating in air at 99.97% efficiency down to 0.3 microns, decreasing harmful air pollution and irritants.
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Scientific Design: The filter works through interception, impaction, and diffusion with zig-zagging movements instead of chemicals—turning contaminated air into clean air.
\n
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Health Protection: HEPA filtration significantly reduces allergens, asthma triggers, and airborne pathogens, improving indoor air quality for better respiratory health.
\n
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Proven Technology: Originally developed for sensitive environments, HEPA filtration is now the gold standard for air purification against virus, bacteria, and fungi.
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Comprehensive Protection: From pollutants, moulds, allergens, bacteria, and viruses to everyday dust, HEPA filters provide complete protection against airborne particles.
\n
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Regular Maintenance: While effective, HEPA filters require proper care—learn how to clean the HEPA filter or when to replace it for optimal performance.
\n

What is a HEPA Filter?

HEPA stands for High Efficiency Particulate Air, representing a specific technical standard in air purification. To qualify as a true HEPA filter, it must trap at least 99.97% of particles that are 0.3 microns in diameter—about 1/300th the width of a human hair!

The technology behind these powerful filters was initially developed during World War II to capture radioactive particles. Today, strict requirements established by air conditioning engineers ensure that only filters meeting rigorous testing standards can qualify as HEPA filters.

What makes these filters special is their construction using synthetic materials or glass fibers. True HEPA filters contain a dense maze of randomly arranged fibers that create multiple opportunities to capture nasty contaminants like pollutants, molds, allergens, bacteria, and viruses.

How HEPA Filters Work

The Science Behind HEPA Filtration

A HEPA filter might look simple, but its design is ingenious. The filter consists of thousands of interwoven fibers creating a strong barrier. Unlike other air purification technologies HEPA filters work through mechanical filtration, physically trapping particles as air passes through.

The pleated design significantly increases the surface area available for filtration, maximizing its effectiveness of HEPA filters while maintaining good airflow. This design creates multiple opportunities to capture airborne particles, turning contaminated air into clean air without introducing additional substances into your environment.

The Three-Stage Filtration Process

HEPA filters capture particles through three main mechanisms, each targeting different sizes:

\n
Interception: Medium-sized particles follow the airstream but stick to fibers when they come close enough.
\n
\n
Impaction: Larger particles crash directly into fibers due to their momentum and get trapped—like pollutants, molds, allergens, and larger bacteria.
\n
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Diffusion: The smallest particles move with zig-zagging movements instead of straight paths due to Brownian motion, increasing their chances of contacting and sticking to fibers. This captures smaller particles including many harmful bacteria and viruses.
\n

These mechanisms work together to create an air purification system that effectively transforms contaminated air into clean air, leaving fresh pristine air to fill your living space.

What Can HEPA Filters Capture?

Particle Size Range

Understanding particle sizes helps appreciate what HEPA filters capture. The 0.3 micron standard is the most challenging particle size to filter, yet HEPA excels at it. Particles larger or smaller than 0.3 microns are captured with even greater efficiency.

For perspective:

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Human hair: 50-70 microns
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Dust mite: 10 microns
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Pollen: 10-100 microns
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Mold spores: 3-40 microns
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Bacteria: 0.3-10 microns
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Viruses: 0.02-0.3 microns
\n

With HEPA filters capturing 99.97% of 0.3-micron particles, they're extremely effective at filtering larger contaminants and surprisingly good at trapping even smaller particles—making them effective against virus, bacteria, and fungi in your home.

Types of Contaminants Filtered

HEPA filters excel at removing a wide range of airborne particles that impact your health:

Allergens: HEPA filtration effectively captures:

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Dust mites and their waste
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Pet dander
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Pollen
\n
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Mold spores
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Household Particles:

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Dust from furniture and carpets
\n
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Cooking residue and smoke
\n
\n
Paper dust and fibers
\n
\n
Skin cells
\n

Biological Contaminants: HEPA filters effectively decrease harmful viruses and bacteria, including:

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Most bacteria species
\n
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Many viruses (often attached to larger particles)
\n
\n
Fungi
\n

This comprehensive filtration means an air purifier installed with HEPA filter technology can dramatically improve indoor air quality, especially for those with allergies or respiratory sensitivities.

HEPA Filter Efficiency

The 99.97% Standard

The 99.97% efficiency rating isn't just impressive—it's precise. For every 10,000 particles of 0.3 microns that enter the filter, only 3 will pass through. For larger particles, the efficiency approaches 100%.

Industry professionals use Minimum Efficiency Reporting Values (MERV) to rate filters. HEPA filters typically score MERV 17-20, the highest possible ratings. Standard home filters might range from MERV 1-13, explaining why true HEPA filters are so much more effective.

This exceptional performance is why an air purifier installed with HEPA filter technology can make such a noticeable difference in how clean your air feels and smells.

Beyond 0.3 Microns

While the 0.3-micron standard gets attention, HEPA filters are even more effective at capturing both larger and smaller particles:

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For larger particles: Nearly 100% efficiency through impaction and interception
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For smaller particles: Remarkably high efficiency through diffusion as tiny contaminants make zig-zagging movements instead of following straight paths
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However, HEPA filters do have limitations and cannot capture:

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Gases and odors
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Some ultrafine particles below 0.01 microns
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This is why many high-quality air purifiers combine HEPA with other technologies like activated carbon for comprehensive air purification.

HEPA Filters vs. Other Air Purification Technologies

Understanding how HEPA compares to alternatives helps you make informed decisions about improving indoor air quality.

Standard Filters: Typical furnace filters capture only larger particles. With lower MERV ratings, they might trap 20-85% of particles—far below HEPA's 99.97% efficiency. They're useful for protecting HVAC equipment but inadequate for significantly reducing airborne contaminants.

Activated Carbon: These excel at absorbing odors and gases that HEPA filters cannot capture. Many air purifiers combine both technologies for complete protection.

Ionizers: These charge particles to make them stick to surfaces but may produce ozone as a byproduct. Their efficiency varies widely and is typically not as reliable as HEPA filtration.

UV Purification: Ultraviolet light can kill some bacteria and viruses but doesn't physically remove particles from the air.

The key advantage of HEPA filtration is its consistent, proven performance without harmful byproducts. This is why properly ventilated air purifiers with HEPA filtration remain the gold standard for removing particulate matter from indoor air.

Health Benefits of HEPA Filtration

Reduction of Respiratory Issues

For millions suffering from asthma and allergies, HEPA filtration can significantly improve daily comfort by removing airborne triggers that cause symptoms.

Asthma sufferers benefit particularly as many attacks are triggered by airborne particles like dust mites, pet dander, and pollen. Research shows HEPA air purifiers can reduce asthma symptoms and decrease the need for rescue medications.

Seasonal allergy sufferers find relief as HEPA filters capture pollen before it causes symptoms. Many users report better sleep and fewer symptoms when consistently using air purifiers with HEPA filtration.

Beyond diagnosed conditions, many people experience improved respiratory comfort as HEPA filters remove irritants that cause coughing, congestion, and throat irritation—especially in homes with high dust levels or in urban areas with outdoor pollution.

Protection Against Airborne Illnesses

One of the most valuable benefits is how HEPA filters effectively decrease harmful viruses and bacteria by capturing respiratory droplets that carry pathogens.

HEPA filtration has long been used in hospitals precisely because of this capability. The same technology can help protect your family at home, creating an additional defense layer against common illnesses.

Continually removing bacteria and fungi effectively decreases harmful exposure, HEPA filtration contributes to a healthier living environment that supports overall respiratory wellness and helps prevent the spread of airborne diseases.

Maintaining Your HEPA Filter

Cleaning vs. Replacing

Proper maintenance keeps your HEPA filter working effectively:

\nReplace HEPA Filters:

Most true HEPA filters should be replaced rather than cleaned. Their complex structure can be damaged by washing, creating gaps in the filter that reduce efficiency. For these:

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Replace according to manufacturer's schedule
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Consider more frequent replacement if you have pets or allergies
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Never wash unless specifically approved by the manufacturer
\n

\nClean HEPA Filters:

Some designs can be cleaned. To clean the HEPA filter properly:

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Follow exact manufacturer instructions
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Typically use gentle rinsing with water (avoid soap unless specified)
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Allow to dry completely before reinstalling
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Never use high pressure or scrubbing
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Even \"permanent\" filters eventually degrade and require replacement after multiple cleanings.

Maximizing Filter Life

To get the most from your HEPA filter:

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Maintain pre-filters that capture larger particles first
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Position your air purifier away from heavy dust sources
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Check filters monthly for visible buildup
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Follow indicator lights on your device
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Replace on schedule even if the filter looks clean
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With proper care, your HEPA filtration system will continue delivering clean air efficiently, protecting your health and improving your living environment.

Proper Use of HEPA Air Purifiers

For optimal air purification, consider these strategies:

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Position the purifier where airflow isn't obstructed—at least 1-2 feet from walls
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Place in rooms where you spend the most time
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Keep doors and windows closed when using
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Avoid corners or under furniture where circulation is limited
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Size matters—every air purifier has a recommended room size. Using an undersized unit for a large space results in inadequate filtration:

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Look for a Clean Air Delivery Rate (CADR) about 2/3 of your room's square footage
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Consider multiple units for larger spaces
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For bedrooms, continuous operation is key
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Properly ventilated air purifiers ensure clean air distribution. Most units draw air from all sides and expel filtered air from the top or front. Keep these vents unblocked for optimal air circulation throughout your space.

Limitations of HEPA Filtration

While highly effective, HEPA filters cannot remove:

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Gases and odors: Chemical fumes and VOCs pass through HEPA filters
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Ultrafine particles: Some particles below 0.01 microns may pass through
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Settled dust: HEPA purifiers only filter airborne particles, not those already on surfaces
\n

Common misconceptions include:

\n
\"HEPA removes everything\": They only remove particulate matter, not gases
\n
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\"All HEPA products are equal\": Without proper certification, some \"HEPA-type\" filters fall short
\n
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\"One purifier cleans the whole house\": Purifiers clean air in their immediate vicinity unless connected to central HVAC
\n

For complete air quality management, combine HEPA filtration with:

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Regular cleaning to reduce dust sources
\n
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Proper ventilation to bring fresh air in
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\n
Source control to minimize pollutants
\n
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Additional technologies for odors and gases
\n

HEPA air filters represent one of the most significant advances in improving air quality, offering proven protection against airborne particles that affect health and comfort. From their origins in military applications to widespread home use, these filters set the standard for air purification excellence.

The science behind HEPA filtration—capturing particles through multiple mechanisms—enables removal of 99.97% of particles as small as 0.3 microns, including common allergens, bacteria, and many viruses. This makes HEPA filtration particularly valuable for those with respiratory sensitivities.

While HEPA has limitations regarding gases and odors, it remains the cornerstone of effective air purification when properly sized, placed, and maintained. For those looking to improve air quality, HEPA filtration offers a scientifically-proven approach to creating cleaner, healthier air filled with fewer contaminants.

By understanding HEPA filters and how they work, you can make informed decisions about improving the air quality at home—breathing easier knowing you've taken an important step toward creating a healthier indoor environment.

About Windmill Air

At Windmill, we believe comfort shouldn't be complicated. We're making air care simple, beautiful, and eco-friendly. Our products combine sleek design with smart features and powerful performance, including advanced filtration systems that help create your perfect indoor sanctuary. From window AC units to air purifiers and smart fans, Windmill is reimagining home climate products to be more efficient, easier to use, and kinder to the environment—because we believe everyone deserves clean, comfortable air without compromise.

Frequently Asked Questions

What is a HEPA filter used for?
HEPA filters are used to remove airborne particles including dust, allergens, pollen, mold spores, bacteria, and many viruses from indoor air. They're ideal for improving indoor air quality, especially for people with allergies, asthma, or other respiratory conditions.

Do HEPA filters remove pet dander?
Yes, HEPA filters are extremely effective at removing pet dander, which typically ranges from 2-10 microns in size. Since HEPA filters capture 99.97% of particles as small as 0.3 microns, they easily trap pet dander particles, making them excellent for pet owners with allergies.

What are the two disadvantages of HEPA filters?
The main disadvantages of HEPA filters are their inability to remove gases, odors, or VOCs (requiring additional filtration like activated carbon) and their higher replacement costs compared to standard filters. True HEPA filters also create more airflow resistance, potentially requiring stronger fans that use more energy.

When should you use a HEPA filter?
You should use a HEPA filter if you have allergies, asthma, or respiratory sensitivities; live in an area with high pollution; have pets; or simply want the cleanest possible indoor air. They're particularly valuable during allergy seasons, in homes with new babies, or after renovation work that generates dust.

Why are HEPA filters rarely used in homes?
HEPA filters were historically less common in homes due to their higher cost, the need for specialized equipment to handle their airflow resistance, and lack of consumer awareness about indoor air quality. However, this is rapidly changing as prices have decreased, technology has improved, and health awareness has increased, making HEPA filtration increasingly common in residential settings.

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If you're sneezing indoors and constantly battling indoor allergies, your air conditioning system might be both the culprit and the solution. The right air conditioner does more than just deliver cool air—it creates a sanctuary by filtering out allergens like dust mites, pet dander, pollen, and mold spores while maintaining the perfect humidity levels for easier breathing.

Whether you're considering a window air conditioner, portable AC unit, or split system, choosing an allergy-friendly option can transform your living space into the retreat it should be. Let's explore how finding the best air conditioner for allergies can help improve indoor air quality and allow allergy sufferers to breathe easier.

How Air Conditioners Help Allergy Sufferers

For allergy sufferers, an air conditioning system is more than just a cooling solution—it's actually a key player in creating a better indoor environment. By filtering allergens, controlling humidity, and improving air circulation, the right air conditioner can help reduce allergy symptoms and boost indoor air quality.

Filtering Allergens for Cleaner Air

Your AC's air filter is your first line of defense against indoor allergens. Whether you have a window air conditioner, portable AC unit, or split system, the best air conditioners for allergies come equipped with filters designed to trap microscopic airborne particles, keeping the air in your home cleaner.

\n
HEPA filters capture even the smallest allergens, including fine dust and pollen, helping seasonal allergy sufferers breathe easier
\n
\n
Carbon filters help remove odors and other pollutants, making your living space fresher
\n
\n
Proper maintenance is key—regularly replacing or cleaning a dirty air filter ensures filtered air continues circulating without obstruction
\n

Humidity Control — Reducing Mold and Dust Mites

High humidity levels create the perfect breeding ground for mold growth, dust mites, and other allergens. A well-functioning air conditioning helps regulate indoor humidity, keeping it below 50%—a level where mold spores and dust mites struggle to survive.

\n
Air conditioning systems can help you track humidity levels in your space
\n
\n
A portable air conditioner with humidity regulation can be a great option for enclosed spaces
\n
\n
Keeping windows closed during peak allergy season maintains a controlled environment and prevents airborne allergens from entering your home
\n

Air Circulation: Keeping Indoor Air Fresh

Consistent air circulation ensures that allergens don't settle on surfaces. A well-designed air conditioning continuously moves filtered air throughout your living space, preventing stagnation and reducing respiratory issues.

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Air purifiers can work alongside your AC unit to further remove airborne particles
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UV light technology helps neutralize bacteria and mold spores in the air conditioner's filter
\n
\n
A properly maintained cooling system ensures that clean, fresh air is always flowing
\n

Best Types of Air Conditioners for Allergy Relief

Sorting through the best air conditioners for allergies means considering options that not only cool your home but also help reduce allergens, better indoor air quality, and maintain proper humidity levels. Each type of air conditioner has its own advantages for allergy sufferers. Let's break down your options:

Central Air Conditioning Systems

A central air conditioning system is one of the most effective ways to improve air circulation and filter allergens throughout your entire home. These systems use advanced air filters, such as HEPA filters and carbon filters, to remove dust, pollen, pet dander, and mold spores, ensuring cleaner indoor air.

Key Benefits:

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Consistent cool air throughout your home, minimizing temperature fluctuations that can worsen allergy symptoms
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Advanced air purification through high-quality air filters that trap airborne allergens
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Maintains optimal humidity levels, preventing mold growth and reducing dust mites
\n

Ductless Mini-Split Systems

Ductless mini-split systems offer personalized temperature control for individual rooms, making them ideal for allergy sufferers who need customized comfort. With high-efficiency filters that remove airborne particles, dust, pet hair, and other allergens, these systems enhance indoor air quality without relying on ductwork, which can harbor dust and mold.

Key Benefits:

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Targeted cooling for specific rooms, reducing allergen exposure in enclosed spaces
\n
\n
Advanced air filters capture pollen, dust mites, and other contaminants
\n
\n
No ducts mean fewer hidden allergens, creating a healthier indoor environment
\n

Portable Air Conditioners

Portable air conditioners are great for seasonal allergy sufferers who need temporary relief in specific rooms. These units often come with HEPA filters or carbon filters that remove airborne allergens, providing cleaner air in high-allergy zones.

Key Benefits:

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Mobility allows you to move the unit where it's needed most
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Effective for cooling small spaces and enclosed areas
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Lower cost compared to central air conditioning or split systems
\n

Window Air Conditioners

Window air conditioners are an excellent option for allergy sufferers, combining cooling power with effective filtration in a compact unit. With the right window AC, you can still combat allergens effectively. Not all window units are created equal—some brands or even older units can sometimes worsen allergies by circulating dust, bringing in outdoor allergens or harboring mold, but modern units with proper filtration systems solve these problems.

Key Benefits:

\n
Advanced filtration systems capture dust, pollen, and other airborne particles
\n
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Humidity control helps prevent mold growth and dust mite proliferation
\n
\n
Sealed installation keeps outdoor allergens from entering your home
\n
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Regular airflow prevents allergens from settling on surfaces
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Antimicrobial features in some models prevent bacteria and mold growth
\n

For enhanced protection, pair your window AC with an air purifier to create a strong allergen defense system.

When choosing the best air conditioner for allergies, consider your specific needs, the size of your space, and the severity of your allergies. Central air provides whole-home filtration, ductless mini-splits offer targeted cooling with superior air purification, and portable units deliver a budget-friendly way to combat indoor allergens in specific rooms.

By selecting an AC unit with the right air filter, UV light technology, and humidity control features, you can create a living space with improved indoor air quality where you can breathe easier and enjoy fresh, filtered air year-round.

Maintenance Tips for Optimal Allergy Relief

Even the best air conditioner won't help your allergies if you don't maintain it properly. Regular air conditioner maintenance is essential for keeping air quality high and ensuring your AC unit continues to effectively reduce allergens like dust mites, pet hair and dander, mold spores, and pollen. Simple tasks like changing air filters, scheduling HVAC servicing, and keeping windows closed can make a big difference in preventing airborne allergens from circulating in your living space.

Here's how to keep your air conditioning system running efficiently for cleaner indoor air and better allergy relief:

Regular Air Filter Replacement

A clean air filter is your first line of defense against indoor allergens. Whether you have a central air conditioning system, window air conditioner, portable AC unit, or split system, regularly changing or cleaning your air filter prevents dust, pet hair, pollen, and other contaminants from recirculating.

Best practices:

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Disposable filters should be replaced every three months or every 30 days during allergy season
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Washable filters should be cleaned at least once a month to maintain air circulation and prevent a dirty air filter from clogging airflow
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Portable air conditioner filters should be cleaned every two weeks to ensure filtered air stays fresh
\n

A well-maintained air conditioner's filter ensures airborne particles don't build up, leading to a healthier indoor environment and improved indoor air quality.

Professional Servicing

Scheduling HVAC system maintenance at least once a year ensures your air conditioning system runs efficiently and continues to remove allergens effectively. Professional servicing includes:

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Cleaning coils and fins to maintain cool air circulation
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Checking for leaks that could contribute to mold growth and high humidity
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Inspecting air ducts in central air conditioners to prevent dust and other contaminants from accumulating
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By keeping your cooling system in top shape, professional servicing helps eliminate airborne allergens, improving air purification and reducing respiratory issues for seasonal allergy sufferers.

The key to allergy-friendly air conditioning is proper maintenance of your system, ensuring airborne allergens are continuously filtered out, preventing respiratory issues and keeping your indoor air quality at its best. Regularly replacing air filters, scheduling HVAC servicing, and keeping windows closed will help you enjoy a healthier indoor environment with fresh, purified air—all while staying cool and comfortable.

Additional Steps to Improve Indoor Air Quality

Your air conditioner is a huge help, but it works even better when combined with other allergy-fighting strategies. Beyond using an air conditioner, other measures can further better indoor air quality and reduce allergens. These steps complement your air conditioning system and contribute to a healthier home.

Using Air Purifiers

Air purifiers with HEPA filters trap allergens like pollen, dust, and pet dander, while models with UV light technology neutralize airborne contaminants. When combined with an air conditioner, air purifiers enhance air purification, providing additional relief for allergy sufferers.

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Standalone units work continuously, even when your AC cycles off
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HEPA filtration captures microscopic particles that might slip through your AC's filter
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Target-specific models address particular concerns like pet allergies or mold sensitivity
\n

Managing Pet Hair and Dander

Regularly grooming and bathing pets helps reduce dander and pet hair in your home. Keeping pets out of certain rooms, particularly bedrooms, can limit allergen exposure and improve indoor air quality.

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Frequent brushing (ideally outdoors) prevents loose fur from becoming airborne
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Designating pet-free zones creates allergen-safe spaces in your home
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Washable pet bedding allows you to frequently remove accumulated allergens
\n

Controlling Dust Mites

Dust mites thrive in high humidity and bedding. Using allergen-proof pillow and mattress covers and washing linens weekly in hot water can significantly reduce their presence, leading to a healthier indoor environment.

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Allergen-resistant covers trap dust mites and prevent their allergens from becoming airborne
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Hot water washing (at least 130°F) kills dust mites in bedding
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Maintaining humidity below 50% creates an inhospitable environment for these microscopic allergens
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Replacing carpeting with hard flooring eliminates a major dust mite habitat
\n

When combined with a properly maintained air conditioning system, these additional steps create a complete approach to allergen control. By addressing multiple sources of indoor allergens, you can significantly better indoor air quality and reduce respiratory issues, creating a true sanctuary for allergy sufferers.

Summary

A good air conditioner does more than just cool your home—it creates a sanctuary by filtering out allergens like dust, pollen, and pet dander while maintaining the perfect humidity level to discourage mold and dust mites. This balanced environment is especially valuable in city apartments where outside pollution can easily drift in, or in smaller spaces where allergens quickly concentrate.

Finding the right cooling solution depends on your space and needs. Central systems work well for whole-home coverage, mini-splits offer room-by-room control, and portable or window units provide flexibility in almost every space. With regular maintenance and the right features, your air conditioner becomes a powerful ally in the fight against indoor allergens.

About Windmill Air

At Windmill, we've taken a fresh approach to air conditioning. We believe your cooling solution should work effectively while complementing your space, not disrupting it. Our units quietly filter allergens and maintain ideal humidity levels while blending seamlessly into your home's design.

Our air conditioners are refreshingly easy to install—no special tools or complicated manuals needed. We understand your home is your retreat from the world, which is why our units fade into the background visually while actively improving your air quality. It's all about helping you breathe easier, in every sense of the phrase.

Frequently Asked Questions

How often should I replace my air conditioner's filter to reduce allergens?

Replace disposable filters every three months and clean washable filters monthly to maintain high air quality.

Can portable air conditioners reduce allergens in small spaces?

Yes, portable air conditioners offer targeted cooling and effective air filtration for apartments or single rooms.

What are the benefits of HEPA filters in air conditioners?

HEPA filters trap 99.7% of airborne particles, including pollen, dust mites, and pet dander, bettering indoor air quality.

How does controlling humidity help reduce allergens?

Keeping humidity levels below 50% prevents mold growth and dust mites, reducing allergen buildup in your home.

What features should I look for in the best air conditioner for allergies?

Prioritize units with HEPA filters, UV light purification, self-cleaning functions, and humidity control features.

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Is an air purifier a fan? While both help create airflow in your space, they serve completely different purposes when it comes to creating your home sanctuary.

A fan's main job is to circulate air and create that refreshing breeze we all love, while an air purifier is designed to remove dust, allergens, smoke, and airborne particles to improve your indoor air quality. Understanding the differences helps you create the perfect environment in your urban home.

What is an Air Purifier?

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An air purifier is your ally in the fight against indoor air pollution. These devices remove contaminants from your air, significantly improving indoor air quality. Using technologies like HEPA air filters and activated carbon, they capture airborne particles, odors, and pollutants that can affect your wellbeing.

By eliminating these invisible irritants, air purifiers help create that 'ahh I'm in my happy place' feeling, especially for those with allergies or respiratory concerns. Think of an air purifier as the guardian of your home's air ecosystem.

How Does an Air Purifier Work?

Unlike a fan that simply moves air around, an air purifier actively cleans it. It's the difference between sweeping dust under the rug and actually removing it from your home.

The Power of HEPA and Activated Carbon Filters

A quality HEPA filter captures 99.97% of airborne particles as small as 0.3 microns—that includes dust mites, pollen, and mold spores that can trigger allergies and affect your comfort. These filters are also remarkably effective at removing microplastics from your indoor air, capturing 99.7% of airborne microplastic particles that have become increasingly prevalent in our environments. It's like having a microscopic bouncer that keeps unwanted particles out of your lungs.

Activated carbon air filters take care of odors, smoke, and volatile organic compounds (VOCs), reducing unwanted smells and harmful chemicals. When combined with HEPA filtration, this dual-layer approach ensures comprehensive protection against both visible pollutants and invisible threats like microplastics that can accumulate in your living space. They're particularly helpful in urban environments where outside pollution can find its way inside.

While an air purifier creates a healthier environment, it doesn't provide the cooling breeze of a fan. It's focused on quality, not temperature.

Why Indoor Air Quality Matters

We often focus on keeping our urban homes cooler, but indoor air quality deserves just as much attention. The air in your apartment can contain 2-5 times more pollutants than outdoor air, even in city centers.

Airborne particles like dust, pet dander, smoke, and pollen build up in enclosed spaces, potentially triggering allergies and affecting your health. A fan might make you feel cooler, but it won't remove these air pollutants—that's where an air purifier makes all the difference.

By filtering out these invisible irritants, air purifiers help transform your space into a true sanctuary where you can breathe easy and feel your best.

What is a Fan?

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A fan is a simple yet effective device that creates air movement to help you feel cooler. Using electricity to rotate blades, fans circulate air around your space, creating that refreshing breeze we all crave during warmer months.

While fans don't purify the air, they excel at improving air circulation and making spaces feel more comfortable. Their straightforward design makes them easy to use and position for direct relief from heat—just point and enjoy.

The Science Behind Air Circulation and Cooling

A fan helps you feel cooler through a process called convective cooling. As air moves across your skin, it helps evaporate moisture, creating a cooling sensation. While it makes a room feel more comfortable, a fan doesn't actually lower the temperature—it's all about airflow and perception.

An air purifier, on the other hand, focuses on removing particles from your air rather than creating a cooling effect. Its internal fan system is designed to pull air through filters efficiently, not to cool your skin.

Using both devices together gives you the best of both worlds: clean, healthy air that feels refreshing and comfortable.

Can an Air Purifier Work as a Fan?

While air purifiers do move air as part of their filtration process, they're not designed to be fans. Most air purifiers have integrated fan systems that help with moderate air circulation, but these are optimized for filtering, not cooling.

The airflow from an air purifier is typically gentler and more diffused than what you'd get from a dedicated fan. If you're looking for that refreshing breeze on a hot day, an air purifier alone won't deliver the cooling relief you're after.

For the complete sanctuary experience, pairing an air purifier with a dedicated fan (or better yet, one of our sleek, energy-efficient AC units) gives you both clean air and comfortable temperatures.

Air Purifier vs. Fan: Key Differences

If you're still wondering \"is an air purifier a fan?\", let's break down the essential differences:

1. Air Circulation vs. Air Filtration

A fan simply moves air around your space, creating a breeze that makes things feel cooler. While this improves comfort, it doesn't address air quality issues—it actually stirs up dust and allergens rather than removing them.

An air purifier, however, is equipped with specialized filters that trap particles and pollutants, actively improving your indoor air quality. It doesn't just move air; it cleans it.

2. Cooling Effect vs. Cleaner Air

Fans shine when it comes to providing immediate comfort through increased air movement. The breeze they create helps cool your skin through evaporation, making hot days more bearable.

Air purifiers focus on creating healthier air by removing irritants and pollutants. While they do circulate air as part of this process, cooling isn't their primary function—they're working behind the scenes to make your environment healthier.

3. Filters vs. Fan Blades

The heart of an air purifier is its filtration system. High-quality HEPA filters can capture particles as small as 0.3 microns—that's smaller than most bacteria! These filters continually remove dust, allergens, smoke, and other pollutants as air passes through them.

A fan relies simply on blades to move air around. Without any filtration capabilities, fans can't improve air quality on their own—they're all about movement, not purification.

Which One Do You Need?

Choosing between an air purifier and a fan depends on your primary need: cleaner air or a cooling effect. Here's a straightforward comparison:

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\n Feature \n	\n Air Purifier \n	\n Fan \n
\n Main Function \n	\n Removes dust, allergens, smoke, and other air pollutants \n	\n Circulates air to create a cooling effect \n
\n Improves Air Quality? \n	\n Yes, traps pollutants with HEPA filters \n	\n No, only moves air around \n
\n Cools the Room? \n	\n No, does not provide cooling \n	\n Yes, increases airflow for comfort \n
\n Best For \n	\n Reducing dust, odors, pet dander, and improving indoor air quality \n	\n Feeling cooler by increasing air circulation \n

Looking for Both?

For the ideal home sanctuary, why choose? Having a separate air purifier and fan together gives you the complete package. While a fan helps you feel cooler with refreshing air circulation, an air purifier works quietly in the background to filter out irritants and pollutants.

This dynamic duo ensures you're not just comfortable, but breathing cleaner, healthier air too. Position them thoughtfully in your space to maximize their benefits—place the fan where you'll feel its breeze directly and the air purifier where it can efficiently filter air throughout the room. There are sometimes purifier fan combos, but they are usually not as affective as separate units.

The Role of Fans in Your Air Purifier Performance

Strategically placed fans can actually help your air purifier work more efficiently. By improving overall air circulation, a fan helps move distant air toward your purifier, allowing it to filter more of the room's air more quickly.

This teamwork approach is especially helpful in larger spaces where air might otherwise become stagnant in corners or distant areas. Just be mindful not to position your fan in a way that blows directly into or away from the air purifier's intake—you want to create gentle circulation that guides air toward the purifier.

Tips for Improving Indoor Air Quality

Creating your perfect air sanctuary is easier than you might think:

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Right-size your air purifier - Match the purifier to your room size for optimal performance. Check the CADR (Clean Air Delivery Rate) to ensure your purifier can handle your space effectively.
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Create a circulation team - Position a fan to help move purified air throughout your space. Placing your fan at a slight angle to your purifier can create a gentle circular airflow pattern that maximizes coverage.
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Stay on top of maintenance - Regularly clean or replace filters for best performance. Set calendar reminders for filter changes so you never compromise your air quality with an overdue filter.
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Reduce pollution sources - Minimize chemicals, smoke, and other irritants in your home. Consider natural cleaning products, smoke-free policies, and removing shoes at the door to prevent pollutants from entering in the first place.
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Let your purifier run - Continuous operation at lower speeds often works better than intermittent use. This consistent approach maintains clean air levels rather than forcing your purifier to work harder to \"catch up\" after being off.
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By following these straightforward steps and using both air purification and circulation to your advantage, you can create a noticeably healthier, more comfortable living environment.

Conclusion

So, are air purifiers fans? Not exactly. While some air purifiers use fans as part of their filtration system, their main purpose is completely different. Air purifiers are focused on improving your indoor air quality by removing pollutants and allergens, while fans are designed to create airflow that helps you feel cooler.

For the complete home sanctuary experience, consider using both. An air purifier creates a healthier environment by cleaning your air, while a fan provides that refreshing breeze we all love, especially during warmer months.

Ready to breathe cleaner, fresher air? Explore Windmill's thoughtfully designed air quality solutions and find the perfect match for your urban home. We make it easy to find the right one and get it up and running, so you can just chill.

Frequently Asked Questions

Can an air purifier cool a room?

Not really. While air purifiers do circulate air as part of the filtration process, they're not designed to create the cooling effect you get from a fan or air conditioner. Their primary job is to clean your air, not cool it.

That said, breathing cleaner air can make your space feel fresher and more comfortable overall. For actual cooling, you'll want to pair your air purifier with a fan or one of our sleek, easy-to-install AC units.

Can I use an air purifier and fan at the same time?

Absolutely! In fact, they make a great team. The fan improves air circulation, helping your air purifier filter more effectively by drawing in air from around the room. Just position them thoughtfully so the fan's airflow complements rather than disrupts the air purifier's intake pattern.

How does fan speed affect an air purifier's performance?

The fan speed setting on your air purifier directly impacts how quickly it can filter your air. Higher speeds pull in and process more air, making them ideal for quick purification after cooking, during high pollen days, or when you need to address smoke or pet dander quickly.

Lower speeds are quieter and more energy-efficient, making them perfect for maintaining already clean air during normal daily use or overnight. For most situations, a medium setting offers a good balance between filtration power and noise level.

Can I use an air purifier in an apartment or condo?

Definitely! Air purifiers are perfect for urban homes where outside pollution can find its way inside or where building ventilation might be limited. They're compact, portable, and don't require any installation—just plug in and enjoy cleaner air.

Our air purifiers are designed with modern apartments in mind: they're sleek enough to blend into your decor, quiet enough not to disturb your peace, and powerful enough to make a real difference in your air quality, even in smaller spaces.

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Best Guide: How to Wash a Window Air Conditioner Effectively

We get it—cleaning your window AC unit might not be at the top of your weekend plans, but a little effort goes a long way. From improving airflow to keeping your air fresh and your energy bills low, these simple steps make the process straightforward and approachable. Regular maintenance helps your unit work better, last longer, and save you money in the long run.

If you're wanting to learn how to wash and clean a window air conditioner efficiently, we've covered everything you need. We'll walk through all aspects of hassle-free cleaning—why it's essential, important safety tips, materials you'll need, and clear instructions to keep your unit in top shape. Follow along to enhance your window air conditioner's performance and air quality.

Key Takeaways

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Cleanliness = Better Cooling: Regular cleaning helps your window AC unit run at its best, keeping your space cooler while using less energy. (Hello, lower utility bills!)
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Breathe Easy: Removing dust, allergens, and mold improves your home’s air quality, making it healthier for you and your family.
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Longer Lifespan: Routine maintenance prevents wear and tear, extending the life of your window AC unit and saving you from costly repairs or replacements.
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It’s Safer Than You Think: With a little prep—like unplugging the unit and protecting electrical components—cleaning your AC can be quick, safe, and hassle-free.
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Simple Materials, Big Impact: All you need are everyday items like mild detergent, a brush, and a vacuum to make a big difference in performance.
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Set It and Forget It: Make cleaning part of your seasonal or monthly routine so your unit always works at its best. Trust us, your future self will thank you.
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Why Washing Your Window AC Unit is Important

Taking the time to clean your window air conditioner delivers several important benefits:

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Improved cooling – Clean components allow for better airflow, meaning your AC can cool your space faster while using less energy.
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Better air quality – Your AC doesn't just cool air—it circulates it throughout your space. A clean unit means fewer dust particles, allergens, and potential mold spores being blown around your home. This is especially important if anyone in your household has allergies, asthma, or other respiratory sensitivities.
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Extended unit lifespan – Regular maintenance can significantly extend your AC's useful life. Dust buildup forces motors and compressors to work harder, leading to increased wear and tear. A well-maintained window AC unit can last 10+ years, while a neglected one might fail after just 2-3 summers.
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Reduced repair costs – Many common AC problems can be prevented with regular cleaning. Addressing minor issues before they become major problems helps avoid costly repairs or premature replacement.
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Consistent comfort – A clean window AC unit provides more reliable cooling with fewer temperature fluctuations, creating a more comfortable living environment throughout the summer months.
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Getting Ready:

Before starting, gather these simple supplies:

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Soft brushes – An old toothbrush works well for detailed cleaning, while a larger soft-bristled brush helps with broader surfaces
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Mild dish soap – Avoid harsh chemicals that could damage components or leave residues
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Warm water – For creating cleaning solutions and rinsing components
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Spray bottle – For applying cleaning solution to hard-to-reach areas
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Clean microfiber cloths – These are gentle on components and effective at trapping dust
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Vacuum with brush attachment – For removing loose dust and debris
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Fin comb (optional but recommended) – For straightening bent cooling fins
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3% hydrogen peroxide solution – For addressing any mold or mildew
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White vinegar – Useful for removing mineral deposits and preventing mold growth
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Garden hose (if cleaning outdoors) – For rinsing larger components
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Protective gloves – To keep your hands clean and protected
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Safety glasses – To protect your eyes from dust and cleaning solutions
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Most of these items are probably already in your home, making this a low-cost maintenance project with high returns.

Safety First:

Before any cleaning, always take these safety measures:

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Unplug your unit completely – This is non-negotiable. Water and electricity create serious safety hazards, so always disconnect power before cleaning.
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If you can't unplug it, turn off power at the circuit breaker – Make sure the circuit stays off throughout the cleaning process.
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Allow the unit to cool down if it's been running – Give your window air conditioner at least 30 minutes to cool down to avoid potential burns from hot components.
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Cover electrical components with plastic – Use plastic wrap or bags to protect control panels, plugs, and other electrical parts from water damage.
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Work in a well-ventilated area – Open windows or doors to ensure good airflow while working with cleaning solutions.
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Read your owner's manual – Manufacturer-specific instructions might contain important information about your particular model.
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Never force components – If something doesn't come apart easily, consult your manual rather than applying excessive force.
\n

Taking these precautions ensures both your safety and the protection of your window air conditioner during the cleaning process.

Step-by-Step Cleaning Process

Step 1: Clean or Replace the Air Filter

The air filter for your window AC unit keeps dust and allergens from circulating through your home. It's the quickest part to clean and makes the biggest difference in performance.

What you'll do:

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Find and remove the filter (usually behind the front panel)
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For reusable filters: wash with warm, soapy water and rinse thoroughly
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For disposable filters: replace if it looks dirty or it's been over a month
\n
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Let the filter dry completely before putting it back
\n

Step 2: Clean the Front Panel and Grille

The front panel is what you see every day, and keeping it clean helps maintain proper airflow.

What you'll do:

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Remove the front panel (usually snaps or slides off)
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Wipe it down with a damp cloth and mild soap
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For deeper cleaning, soak removable parts in warm, soapy water
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Clean between grille slats with a soft brush
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Let everything dry completely before reattaching
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Pro tip: Take a quick photo before removing parts so you'll remember how they fit back together.

Step 3: Clean the Cooling Coils

The condenser coils do the actual cooling work, so keeping them clean significantly improves efficiency.

What you'll do:

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Access the condenser coils (the metal fins behind the filter)
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Gently vacuum with a brush attachment on low setting
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For stubborn dirt, use a spray bottle to lightly apply diluted dish soap
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Wait a few minutes, then wipe clean or rinse carefully
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Straighten any bent fins with a fin comb or credit card
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Pro tip: Always vacuum in the direction of the fins to avoid bending them.

Step 4: Check the Drain Pan and Line

Proper drainage prevents water damage and mold growth.

What you'll do:

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Find the drain pan at the bottom of your unit
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Remove any standing water with a cloth
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Clean with equal parts water and white vinegar
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Make sure the drain hole isn't clogged
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Pour a cup of vinegar through the drain to prevent future buildup
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Pro tip: A tablespoon of vinegar in the drain pan monthly can prevent algae growth.

Step 5: Inspect the Fan and Motor Area

A clean fan means better airflow and quieter operation.

What you'll do:

\n
Access the fan area (consult your manual if needed)
\n
\n
Vacuum away loose dust and debris
\n
\n
Wipe fan blades with a damp cloth
\n
\n
Check for loose parts or unusual wear
\n
\n
Don't spray water near the motor
\n

Pro tip: Listen for unusual sounds when your window air conditioner runs – they often signal that something needs attention.

Step 6: Address Any Mold Issues

Mold affects air quality and can cause health problems.

What you'll do:

\n
Look for dark spots on any surface
\n
\n
Mix equal parts hydrogen peroxide and water
\n
\n
Spray lightly on affected areas
\n
\n
Let sit for 10 minutes, then wipe clean
\n
\n
Make sure everything is dry before reassembly
\n

Pro tip: Preventing mold is easier than removing it – keep your window air conditioner clean and ensure proper drainage.

Step 7: Reassemble and Test

Putting everything back correctly ensures your AC works properly.

What you'll do:

\n
Make sure all components are completely dry
\n
\n
Replace the filter in its proper orientation
\n
\n
Reattach all panels and parts in reverse order
\n
\n
Plug in and run for 15 minutes
\n
\n
Check for strong, cool airflow and normal sounds
\n

Pro tip: Reset your freshly cleaned window air conditioner and run it on high for 10-15 minutes to help dry any remaining moisture and blow out any loosened debris.

Maintenance Tips for Keeping Your Window Air Conditioner Clean

Regular maintenance and annual cleaning is key to keeping your window air conditioner window in top shape. Cleaning the unit regularly as well as keeping the fins straight and free of debris helps prevent things like mold buildup and maintains its efficiency.

How Often Should You Clean Your Filter?

It’s very important to wash or replace the air filter at least once per least once a month during the cooling season. A dirty air filter can significantly reduce the cooling efficiency of your window air conditioner. Regular cleaning ensures the filter is free of clogs and promotes efficient airflow throughout the unit.

Seasonal Deep Cleaning

A window air conditioner should be cleaned thoroughly at least once a year. Additionally, the window air conditioner coils and internal components of air conditioning systems should be cleaned at least once a season to maintain the unit’s efficiency.

Deep cleaning the internal components helps ensure optimal performance and longevity.

Regular cleaning keeps your window AC unit running efficiently, improves air quality, and extends its lifespan. Follow the steps in this guide for monthly filter cleanings and seasonal deep cleans to keep your unit in top shape. A little maintenance goes a long way in saving energy and ensuring cool, fresh air year-round.

Windmill Air

At Windmill, we believe comfort shouldn't be complicated. We're making air care simple, beautiful, and eco-friendly.

Our window AC units combine sleek design with smart features like app control, dual filtration, and 45° airflow for even cooling. Windmill has reimagined window units to be easier to install, more efficient, and quieter than traditional models.

With AC variants designed to fit many room sizes—up to 550 sq ft—you'll find the perfect cooling solution for any space in your home. Our products enhance your comfort while respecting the environment—using eco-friendly refrigerants, energy-efficient operation, and thoughtful touches like auto-dimming displays and washable filters.

From studio apartments to home offices, Windmill ACs are designed to help create your perfect sanctuary. This guide works for all window units, including our easy-to-maintain Windmill ACs.

Frequently Asked Questions

What’s the best way to clean the inside of a window air conditioner?
Open the face panel, use a spray bottle to apply a mild detergent cleaning solution, and gently scrub with a soft brush for a thorough clean.

How often should I clean my window air conditioner unit?
Clean the air filter monthly and do a deep clean at least once a year for optimal performance.

Can I use household cleaners on my window air conditioner?
Yes, but stick to mild detergent or AC coil cleaner—harsh chemicals can damage the unit.

What should I do if I see mold in my window air conditioner?
Use a spray bottle to apply a 3% hydrogen peroxide solution to eliminate visible mold spores and prevent mold growth.

How can I straighten bent fins on my window air conditioner?
Use a fin comb or a small knife to gently realign them—this helps restore airflow and efficiency.

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If your air conditioner isn’t working properly as it should, a quick reset might be all it takes to fix the problem. This guide will walk you through simple, safe steps to get your AC, including Windmill Air units, back up and running in no time.

Understanding When to Reset Your AC Unit

Sometimes, your air conditioner may stop functioning as expected, leaving you wondering what went wrong. In many cases, a simple reset can resolve the issue without the need for a technician. Here are common scenarios where resetting your AC might be the solution:

\n1. After a Power Outage
Power outages can interfere with your AC's operation. When the power returns, your unit may not start up immediately, even though it appears to be connected. This could be due to a system safety feature or a temporary disruption in its internal settings. Resetting your AC can often restore functionality.\n

\n2. Thermostat Issues
If you've set your thermostat to cooling mode, but the air being blown in isn’t as cool as it should be, it might be time for a reset. Occasionally, the temperature sensor might not align properly with the AC's control system or power supply board. Performing a reset can often resolve this issue, restoring the air conditioning unit to proper working order.\n

\n3. Troubleshooting Common Problems
Low airflow, short cycling, and warm or dry air are common issues that could signal the need for a reset. These problems often result from minor system glitches or temporary misconfigurations, both of which a reset can resolve without additional effort.\n

\n4. Avoid Unnecessary Technician Calls
Not every malfunction requires professional intervention. Resetting your AC is an easy first step you can take to address operational hiccups before reaching out to a technician.\n

Knowing when and how to press the reset button on your air conditioner can save you time, money, and frustration, while ensuring your unit continues to provide the cooling comfort you need.

Locating the Reset Button

The reset button on your air conditioner is typically easy to find. For outdoor units, it’s usually near the lower edge, close to the ground. Some models may hide the reset button behind a service panel, requiring tools for access.

On window ACs, look for it on the control panel or near the plug where the power cord connects. If you’re unsure, consult your unit’s manual or visit the manufacturer’s website for precise instructions.

Resetting Your AC Unit

Finding the reset button on your air conditioner is an essential step in troubleshooting and restoring its functionality. For central and air conditioning systems, the air conditioner reset button is often located on the outdoor unit, along the lower edge close to the ground. It’s typically a small, red button designed for easy access.

In some models, the reset button might be hidden behind the service panel for added protection. Accessing it may require a screwdriver or similar tool to remove the panel. Always ensure the power to the unit is turned off before attempting to remove any components to prioritize safety. For window AC units, the reset button is usually found on the control panel or near the power cord connection at the base of the unit.

These buttons are often clearly labeled and may include a “test” to press the reset button, as part of a built-in circuit breaker system. If you’re uncertain about the exact location of the reset button, consult your air conditioner’s manual for specific instructions. Many manufacturers also provide detailed guidance on their websites, which can be particularly helpful for unique or newer models.

With Windmill Air’s user-friendly design, finding and using the reset button should be a simple and intuitive process, allowing you to quickly address any minor operational issues.

Troubleshooting Common Issues

Sometimes, AC issues can be resolved quickly with a little troubleshooting. Here’s how to address some of the most common problems:

If Your AC Unit Is Blowing Warm Air

Warm air can often signal a simple fix. Start by resetting the thermostat to ensure it’s set to the correct cooling mode and temperature. If this doesn’t work, check the circuit breaker box. A tripped circuit breaker box also might prevent your unit from operating properly, cutting off the cool air you expect. However, it's important to acknowledge that not all issues will be resolved by a reset, and persistent problems may require professional air conditioning repair.

If Your AC Unit Is Not Turning On

When your AC refuses to turn on, the issue might be related to power. First, inspect the power or main electrical power supply board, to confirm that the unit is receiving electricity. Make sure the power cord is securely connected, and check for any visible damage to the cord or plug. If you’ve experienced a recent power outage, a reset might also help restore the unit.

If Your AC Unit Is Making Strange Noises

Unusual sounds, like rattling or buzzing, could be due to minor issues. Resetting the unit may stop these noises if they are caused by internal misalignments. Additionally, inspect the unit for loose connections or components that may need to be tightened or secured. Ignoring strange noises could lead to larger issues down the road, so it’s best to address them promptly.

If Your AC Unit Is Not Cooling Properly

Poor cooling performance can often be traced back to the air filter. Check to see if the filter is clogged or dirty, as this can restrict airflow and reduce efficiency. If the filter looks fine, try resetting the unit to clear any temporary system glitches. Regular maintenance, like cleaning or replacing filters, can help prevent cooling issues before they start.

By following these steps, you can often identify and resolve problems quickly, ensuring your own AC system runs smoothly without the need for professional intervention. If the problem persists, it may be time to consult a technician for a closer look.

Preventive Maintenance for Your Air Conditioning Unit

Taking care of your air conditioner with regular maintenance is key to keeping it running smoothly and efficiently. Not only can it help you catch minor issues early, but it also prevents them from turning into costly repairs down the line.

Some essential preventive maintenance tasks include:

Cleaning the air filter
A clean filter ensures proper airflow and optimal cooling.

Checking for refrigerant leaks
Low refrigerant levels can strain your system and reduce its efficiency.

Inspecting the electrical system
Loose or damaged connections can lead to performance issues or even safety hazards.

While some tasks can be done yourself, scheduling an annual check-up with a professional is highly recommended. A trained technician can perform a thorough inspection, identify hidden problems, and ensure your AC unit operates at peak performance.

Consistent care not only protects your investment but also provides the peace of mind that your air conditioning system will keep you cool when you need it most.

Common Mistakes to Avoid

Avoid DIY Electrical Repairs
Fixing electrical issues yourself can be dangerous and may cause further damage to your unit. Always leave electrical repairs to a qualified professional.

Don’t Ignore Strange Noises or Smells
Unusual sounds or odors from your AC are often signs of a problem. Address them quickly to avoid more serious issues or costly repairs.

Keep Up with Regular Maintenance
Skipping routine care, like cleaning filters or scheduling professional check-ups, can reduce efficiency and increase energy costs.

Limit Reset Attempts
Resetting your AC repeatedly won’t fix persistent issues and may harm the system. If one reset doesn’t work, investigate ac issues further or call a technician.

By avoiding these mistakes, you can keep your AC running smoothly and extend its lifespan.

Safety Precautions

When working with your air conditioning unit, safety should always come first. Before attempting any reset or repair, make sure to turn off the power to the air conditioning unit first. This simple step can prevent electrical shocks and protect you from potential hazards.

Always follow the manufacturer’s instructions when resetting or repairing your AC. These guidelines are tailored to your specific model, ensuring you handle the unit properly to restore power, without causing accidental damage or voiding any warranties.

If you’re working with electrical components, it’s essential to wear protective gear like gloves and safety glasses. These precautions provide an extra layer of safety, reducing the risk of injury from sharp edges, loose parts or exposed wires, or electrical connections.

If at any point you feel unsure about how to proceed, don’t hesitate to call a professional. Trained technicians have the expertise to diagnose and fix problems safely and effectively, saving you from potential mistakes or further damage to your unit.

By taking these safety measures, you can confidently address minor issues while keeping yourself and your AC unit out of harm’s way.

Conclusion

Resetting your AC unit is often a simple and effective way to address common issues and restore its performance. With the steps outlined in this guide, you can quickly troubleshoot problems and get your unit back to running efficiently, providing the comfort you need. Air conditioning repair can seem complicated, but often it is a simple fix.

For a seamless and user-friendly experience, Windmill Air products are designed with simplicity and reliability in mind. Whether it’s our smart window ACs or state-of-the-art air purifiers, you can count on intuitive designs that make maintenance and troubleshooting easier than ever.

Remember to prioritize safety and schedule regular maintenance to keep your unit performing at its best. With Windmill’s innovative and stylish solutions, staying cool and comfortable has never been more effortless.

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There’s nothing worse than a faulty AC on a hot summer day. But like all machines, sometimes your AC goes on the fritz, and you’ll need to do some air conditioner troubleshooting. We’ll review some common AC problems and AC troubleshooting solutions so when your machine loses its cool, you don’t lose yours.

Drainage Problems

Water coming out of the machine is a common AC problem. Your AC unit produces moisture during the cooling process, and that moisture has to go somewhere. Some AC units have drain pans located beneath the unit to catch excess moisture, while others rely on gravity to drain the unit out the window.

So let’s get into leaky AC troubleshooting. If you notice water leaking out of the machine into your home, pay attention to where it goes. If water is running down the power cable towards an electrical outlet, immediately turn your unit off and remove the plug from the outlet. If the drip is going somewhere else, the situation is less urgent.

How your unit is installed is the key piece of leaky air conditioner troubleshooting. In order to ensure proper drainage out the window, your unit must be tilted slightly backwards. If you need to change the tilt of your unit, add a thin bumper beneath the unit to raise the front, which will lower the back end. As water follows gravity, this means the excess moisture will drain out the window. Remember when installing, removing, or adjusting your AC unit to always be careful—you want moisture to go out the window, not your air conditioner!

People often confuse a leaking AC for a refrigerant leak, which is a much rarer occurrence. If your AC still produces cool air, then your refrigerant is not leaking. If you notice a lot of moisture and your AC no longer cools your home, immediately stop using it and contact a professional. For a refrigerant leak, there are no DIY air conditioner troubleshooting tips. More information on refrigerants, check out our blog on the subject.

Power Issues

Sometimes, your AC won’t turn on. When there’s an electrical issue with your air conditioner, troubleshooting is complicated.

The first step is determining where the electrical failure is occurring. Test your power source; if it’s an electrical outlet, swap in another appliance to see if it functions. If you use an extension cord, make sure it is properly rated for a heavy-consumption appliance (although, we don’t recommend using your AC with an extension cord).

Once you’ve determined that your power source is live, the next step is trying to reset the power to your unit. Consult your owner’s manual for specific directions for your AC unit, or contact your manufacturer’s support team. We designed the Windmill with a Ground Fault Circuit Interrupter (GFCI) on the power cord to make resetting the power easier for customers.

Like any system, the electrical system in your AC unit wears down with usage. An AC constantly turning on and off will burn out faster than one operating ideally. That means the easiest way to prevent AC power issues is to purchase the correct machine for your home. Check out our blog on BTUs to learn more about selecting the right machine for your space.

Cooling Issues

One of the most frustrating common AC problems is when your unit will not produce cool air. When there’s no cool air coming out of your AC, troubleshooting is a process of elimination.

If your AC unit has multiple modes (like how the Windmill has COOL and ECO modes), determine if the cooling issue is specific to one of the modes. If possible, try running the unit’s fan without engaging the compressor for a while, and then switch to a compressor mode, to see if you can hear the compressor engaging (and feel the difference between room air in Fan mode and the air in Cool mode).

Next, check other parts of the machine. Is the filter clogged up? Replace the filter, or give it a thorough cleaning if the filter is reusable. Is something blocking the back condenser vents? If the vents are covered, heat will get trapped inside the machine and prevent the efficient production of cool air. There are other factors, like how much sun exposure the window gets and what the temperature is like outside, that affect the cooling ability of your window unit. Also make sure the front exhaust vents aren’t blocked, so cool air can move freely into your home.

When your window unit has an issue with its compressor, oftentimes the only fix will be replacing the machine. Contact customer support to learn about your options. That’s why it’s so important to zero in on where the problem is, because other, similar problems might not result in total machine failure.

Solving Other Problems

There are other issues that can crop with an air conditioner. Sometimes the thermostat will provide inaccurate readings, making it impossible for your machine to reach your desired temperature. It’s possible that mold will grow inside your air conditioner, damaging your machine and potentially endangering your health. There are very uncommon issues, like refrigerant leaks or misalignment of internal components. Sometimes the cause is shipping damage, and sometimes the problem stems from manufacturing issues. One thing is always true: when there’s a problem with your AC, troubleshooting is easier if you take good care of your unit. As we’re fond of saying, an ounce of prevention is worth a pound of cure.

Even with perfect AC hygiene, there’s always the chance that something goes wrong. That’s why, here at Windmill, our support team is available seven days a week to help you with air conditioner troubleshooting. We hope we can make fixing your AC problems a breeze!

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It’s a gross summer and you’re stuck working remotely from your overheated apartment. You bought the previous tenant’s window unit air conditioner, but when you turn the unit on it grumbles and sputters and doesn’t blow any cool air. Well, you’ve always been handy, good at tinkering. So you pop the front off the AC unit and look inside, only to be confronted by filters and fans, compressors and condensers, and the realization that you have no idea how an air conditioner works.

You’re not alone. Knowing how an air conditioner works will keep you cooler and save you money, so it’s worth learning the basics. We’ll go over the mechanics behind your AC, as well as some general knowledge about your cooling system. While you might not be an HVAC pro, you’ll be able to answer the next time someone asks, “How does AC work?”

So, how does an air conditioner work? Well, very broadly, your AC takes hot air, pulls the heat out, throws the heat out the window and blows the newly cooled air around your home. A common myth about how an air conditioner works is that it pulls in outside air. However, most modern air conditioners, and every window AC, uses only indoor air.

Have you ever seen the exhaust coming out the back of a window unit? That exhaust is the byproduct of the AC process and actually holds the heat your AC extracted from the air. That sounds a bit complicated, so let’s go into more detail on how the parts of your AC works.

The key cog in your air conditioner isn’t mechanical, but chemical. That chemical—the Refrigerant—constantly changes between a liquid and a gas. When people hear refrigerant, they tend to think of Freon, which is highly toxic and damaging to the environment. However, production of Freon was phased out starting in the 1990s. Modern refrigerants are still toxic, so if you ever think the refrigerant is leaking in your AC, contact a professional!

Okay, so we have the Refrigerant—but how does an air conditioner work with the refrigerant? There are three primary mechanical components to your AC: the Evaporator Coil, the Compressor, and the Condenser Coil. When you turn on your AC, it uses its fan to draw warm air over the evaporator coil. Inside the evaporator coil is the refrigerant, which heats up and evaporates. The compressor directs the evaporated refrigerant through the AC, applying pressure to the vapor, which in turns heats the vapor up. The hot, evaporated refrigerant reaches the condenser coil, where two magic things happen. First, the pressure on the refrigerant turns the vapor back into a liquid. Second, in the process of becoming a liquid, all of the refrigerant’s gathered heat jumps ship.

As your high school physics teacher (and Isaac Newton) said, heat always travels to a cooler area. In the evaporator coil, the heat moves from the air into the refrigerant, because the refrigerant is cooler. Now the opposite happens: the refrigerant sheds all of the heat it has absorbed. The heat leaves the air conditioner via its exhaust vents, the liquid refrigerant returns to the evaporator coil, ready to pick up more heat and begin the process again.

Okay, but how does an AC work with humidity? Humidity, besides being an unpleasant atmospheric condition, refers to the amount of water vapor in the air. As air gets warmer, it can hold more water vapor, which is why warm days feel more humid than cool days. This principle also applies to the air in your home: as your home heats up, the indoor air tends to grow more humid. By pulling the warm air out of circulation, extracting the moisture, and recirculating cool air, your AC fights against that humidity. Remember the exhaust we discussed earlier? That’s basically your home’s humidity. On some days, you can see moisture dripping from the exhaust of an AC. This “urban drip” is—you guessed it—even more humidity. A side note: no one likes when an AC drips on them, but urban drip is not harmful, just unpleasant.

There’s another, glibber answer to the question, “How does an air conditioner work?” And that answer is, of course, “You plug it in and turn it on.” But there’s a well, actually response to even that joke. Understanding this seemingly pedantic point can save you money and help the environment.

First, let’s go over some quick electric bill math. In most places, your electric bill is rated in kWh, which stands for kilowatt-hours. Air conditioners, like all appliances, have a plate installed with information including their power consumption. This information might be provided in Watts (abbreviated W), or broken down into an Amperage (abbreviated A) at a Voltage (abbreviated V). For example, the Windmill Air Conditioner averages a power consumption of 690W, which is equivalent to 6A at 115V.

Let’s say you ran your Windmill AC for 6 hours today. At 690W of consumption, that’s equivalent to 4.14kWh. The average US electric bill is a bit over 13¢, so let’s round up to 14 (because we know the utility company definitely will). At 14¢ per kWh, running your AC today cost you about 58¢. If we ran the AC for 6 hours a day for 30 days, the cost would be about $17.39.

Our reward for solving this math problem is we now have an idea of how much our AC costs to operate normally. While you won’t receive an itemized electric bill, you can still use your electric bill as a diagnostic tool for your AC. Huge spikes in your electric bill can signal a number of problems with your AC or its installation.

Before you check the terms of your warranty, there are a few easy ways to make sure your AC is set up how an air conditioner works best. The first thing to check is the filter on your unit, as a clogged filter lowers the unit’s efficiency. For more information on filters, check our article on that subject. The next check is insulation. Remember how we said that warm air moves to a cooler area? If your AC is installed without insulation, or with gaps in the insulation, warm air will come in through the openings. This will—you guessed it—make your AC run longer and work harder to keep your room cool.

There are also some technical issues which can contribute to energy bill spikes. Internal components like compressors tend to consume more energy as they age, so older units will cost more to run than newer models. It’s also possible that your unit is wrong for your living space. We have an article that goes into more depth on that subject (including explaining what a BTU is) if you’re curious. The tl;dr is that different machines are intended to work in different sized areas. Using a unit that’s too strong for a small room will cause the unit to cycle off quickly, wasting electricity and never dehumidifying a space. Too few BTUs and the unit will run forever, cooling nothing.

The internal mechanisms of your air conditioner might be complicated, but the theory is straight forward. Your AC doesn’t make cool air, it takes the heat out of the air in your home. Air loses heat and cools down as it passes over the evaporator coil, just like how the refrigerant loses heat in the condenser coil. Remember to check common issues like your filter and installation if you notice issues with your unit’s performance. It’s also a good idea to keep an eye on your electric bill so you can see if there are any spikes in power consumption. Now that you know how your unit works, you can check out this article for tips on keeping your AC in tip-top shape. If you want to know more about choosing the right AC unit for your home, check out our article on that subject. And as always, if you ever have any questions about your Windmill AC, our support staff are available to answer questions every day of the week.

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No two ways about it, too much humidity feels yucky. When checking the weather, you might see extreme humidity levels and decide to skip going outside. And who would blame you? As humidity levels rise, your skin feels stickier, sweat dries slower, and bad smells linger. Not to mention the effects humidity can have on your home and the furniture within it! But just because you know what humidity is doesn’t mean you know all the ways to lower humidity. In this blog, we’ll give a brief explainer on the basics of humidity, reveal the ideal humidity for your home, and teach you how to reduce indoor humidity.

What is Humidity?

Humidity (specifically relative humidity, which is the kind you see on your weather report) is a measurement of the amount of water vapor in the air. Humidity is measured by a device called a hygrometer. You often see relative humidity expressed as a percentage, which is expressing how much water vapor is in the air relative to the dew point, which is the point at which the air can hold no more water vapor. As temperature increases, the air can hold more water vapor. Which means that raising the temperature of air lowers the relative humidity, and lowering the temperature of air raises the relative humidity.

If that’s a little confusing, here’s an easy way to imagine relative humidity. Imagine you’re pouring a water bottle into a bowl. If the bowl is bigger, the water bottle will fill a smaller amount of the bowl. Obviously, a smaller bowl will be more full from the water bottle. In this analogy, the water bottle represents the amount of water vapor, and the bowl represents the temperature of the air. There’s a little more science behind humidity—like how different types of air pressure affect relative humidity—but when you’re reading a weather report, these basics should help you understand what a humidity percentage means.

How Much Humidity is Too Much?

The ideal humidity level in your home is from 30 to 50%. Remember, this is a measurement of relative humidity, which means the actual amount of water vapor will shift as the temperature shifts. What’s magical about the 30 to 50% range?

Too much humidity is more than just uncomfortable. But it’s still uncomfortable! As the relative humidity increases, your sweat evaporates more slowly, which makes you feel warmer (and not to mention sweatier!). Humidity can damage water-absorbent paints. Ever noticed that bathroom paint tends to peel more than the pain in the living room? That’s because of the humidity from the shower expanding and cracking the paint on your bathroom walls. Wood furniture can also take a beating from humidity, expanding as the porous wood absorbs water out of the air. Finally—but perhaps worst of all—humidity encourages mold growth, which can lead to harmful respiratory conditions.

However, a home with no humidity is also problematic. When the humidity level gets too low, your skin dries out and your eyes can get irritated. In addition, certain respiratory conditions like asthma are exacerbated by low humidity levels. The ideal humidity level is somewhere in that 30 to 50% range. In the ideal range, you can breathe easily but aren’t wrecking your paint job or encouraging mold to grow.

Ways to Lower Indoor Humidity

When it comes to home climate control, there’s no magical fix. Instead, figure out which of these methods to reduce indoor humidity work best for you. Keep in mind that too little humidity can also be bad, and find the balance to optimize your home environment.

Use Your Air Conditioner

Every air conditioner dehumidifies the air as part of the cooling process. That’s because your AC condenses and evaporates warm air in order to create cool air. The warm air is ejected through the window via the AC unit’s exhaust, which conveniently shunts humidity out of your home as well.

Keep in mind that lowering the temperature in your home will lower the relative humidity. However, operating an air conditioner tends to lower the absolute humidity such that the relative humidity doesn’t increase too much.

Use Exhaust Vents

Remember what we said about paint peeling in the bathroom? When trying to figure out how to reduce indoor humidity, give the bathroom fan a try. Your showers produce a ton of water vapor—that’s what ends up condensing and fogging up the mirror—and with that vapor comes more humidity. When taking a shower, make sure to turn the bathroom vent on. Sure, it’s noisy, but it will keep paint on your walls and the humidity level down.

Likewise, the kitchen fan can help mitigate the humidity increase from boiling water. Running your oven won’t raise humidity levels, but making pasta on the stove releases a ton of vapor into your home environment. Use your kitchen fan wisely and your home stay temperate even with a pot on the stove.

Consolidate Your Houseplants

Here at Windmill, we love the environment. We’re a green company, so we don’t want to tell you to keep greenery out of your home. But many plants produce humidity as part of their respiratory process. Having a ton of plants spread around might make your home seem livelier, but it will also raise the humidity level.

The humidity produced from plants is why greenhouses are so humid. If you’re having issues reducing your indoor humidity, try making a greenhouse room by consolidating your plants into a single area. Make sure the plants are in a well-ventilated environment so the humidity doesn’t get too intense. There are some plants, like succulents, which produce much less humidity than others. If you want to keep greenery spread around your home, consider a less-humid type of house plant.

Set Up a Dehumidifier

As the name implies, dehumidifiers are appliances expressly designed to lower the relative humidity in a home. Some central air systems actually have dehumidifiers built-in, so that your HVAC system more quickly creates a more temperate atmosphere. Standalone dehumidifiers might also decrease your AC usage, as an environment with less humidity will feel cooler. Most dehumidifiers have built-in hygrometers so you can tell when your home reaches the ideal 30-50% relative humidity.

If you don’t want to purchase a factory-made dehumidifier, there are a few ways to build one yourself. Charcoal (also known as activated carbon) is one of the best natural dehumidifiers. Set up a vase, bowl, or tin of charcoal and watch as the humidity is sucked out of the air. Make sure to replace the charcoal every few months so that it doesn’t become inundated with moisture.

Circulate the Air

Earlier, we mentioned that changing the air pressure will affect the relative humidity in your home. When figuring out how to reduce indoor humidity, try expanding the air in which air circulates. Allowing for more airflow usually decreases the air pressure, which will function to decrease the relative humidity. Running a ceiling fan or box fan won’t change the relative humidity level, but sitting in the path of a fan will remove the sweat from you, mimicking sweat evaporation and keeping you feeling cooler.

Even if it’s warm outside, you can use a hygrometer to check if the outdoor air is more humid than indoor air. If outside is less humid, open up the windows and let air circulate through. Just make sure you measure the outdoor air—you don’t want to bring more humidity into your home!

Humidity and You

As we said previously, there’s a lot of different ways to reduce indoor humidity. When figuring out the optimal ways to lower humidity in your home, make sure to try a few different methods. Remember also that, as the seasons change, humidity will behave differently. In cold winter air, a small amount of humidity goes a long way. Likewise, in the summer, you may need less specific dehumidifying measures since your AC is running. But also remember that dehumidifying your home will keep you feeling cool, so your AC may be less necessary.

For more info on humidifiers and how they work with your AC, check out our blog on the subject. For specific info on cooling down an upstairs apartment, we’ve also written a blog on that. If you have questions about staying comfortable with your AC, our support team is available every day of the week to help you out.

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When optimizing the atmosphere in your home, the two main factors to consider are temperature and humidity. At Windmill, we love air conditioning; after all, it’s our business! But we understand that some people require a little something extra to keep their home atmosphere optimized. So today we’re going to cover an air conditioning adjacent product: humidifiers. We’ll cover the benefits of a cool mist humidifier versus an air conditioner, discuss the benefits of using both products, and definitively answer the question, “Is an air conditioner a humidifier?”

What Humidifiers Do

Humidifiers are devices that add humidity to the air of a room, home, or environment. Humidity—by which we mean relative humidity—is the measurement of water vapor in the atmosphere. Humid air often feels hotter than dry air even if both are at the same temperature. That’s because your body cools down by producing sweat, and then having sweat evaporate. Humid air slows down the evaporation process, leaving sweat on your body and leaving you feeling warmer.

So do humidifiers make you feel warmer? It’s not that simple. While humid air slows the evaporative cooling process, humidity has other benefits for the human body. Humidifiers alleviate dry and cracked skin, dry eyes, colds, and certain respiratory conditions.

But it isn’t just your body that feels the effects of a humidifier. Your furniture will also react to changes in the level of humidity. In particular, as humidity increases, wood absorbs water vapor from the air and expands. Conversely, wood furniture will actually shrink in extremely dry conditions. You might be wondering—what about the varnish or sealant applied to furniture? While sealant prevents some moisture from entering or escaping wood (as does varnish, to a lesser degree), humidity levels will still affect your furniture.

Humidifiers and Mold

While there are several types of humidifiers, all have one thing in common: they all release water vapor. As a result, humidifiers are ideal breeding grounds for mold and bacteria. Mold grows quickly in damp environments, feeding off of organic materials. A moldy humidifier is a health risk for everyone. Even in people who are otherwise healthy, prolonged exposure to a dirty humidifier can cause flu-like symptoms.

You can prevent the build-up of mold in your humidifier in a few simple ways. Make sure to regularly change the water in your humidifier and rinse out the tank when changing water. As a good rule of thumb, you should clean a dehumidifier every three days. When you aren’t using your dehumidifier, keep the water reservoir empty and dry.

If possible, fill your dehumidifier’s reservoir with distilled or demineralized water. Since humidifiers convert water into steam, if there are particles in the water, they may be circulated by the humidifier. This can lead to a fine, dust-like covering spreading around your home and settling on furniture.

Humidifier vs. Air Conditioner

Air Conditioners—as we’ve covered elsewhere—naturally dehumidify the air while lowering the temperature. That’s because air conditioners work by transferring heat into vapor and then evaporating the vapor. So, is an air conditioner a humidifier? No, it’s the opposite.

So while an air conditioner is running, it dehumidifies your home. Pitting a cool mist humidifier versus an air conditioner sounds like an inefficient use of electricity that won’t positively affect the climate in your home. However, even though air conditioners and humidifiers perform opposite functions, they actually can function together effectively.

Earlier, we discussed some of the benefits of humidity, like keeping your skin from drying out. Therefore, when there’s no humidity, there’s a greater risk of dry skin and these other health issues. Furthermore, we discussed how changes in humidity can even affect the size of your furniture. So while an air conditioner lowers the temperature in your home, it also lowers the humidity level, putting you at higher risk for these negative effects. Thus, running a cool mist humidifier alongside your AC can preserve humidity levels, keeping your skin from drying out and your furniture from shrinking.

When to Run a Humidifier vs. Air Conditioner

As we’ve established, an air conditioner is not a humidifier. There are different reasons to operate each appliance. To wrap things up, we’ll list some of the conditions that should prompt you to run a cool mist humidifier versus an air conditioner, and some reasons not to run the devices.

Run a humidifier if:

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You’re experiencing dry skin, chapped lips, or irritation around your eyes while at home. If you experience these issues in a controlled environment, it’s a good idea to add some more humidity to the air.
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You suffer from asthma. Respiratory issues (particularly juvenile asthma) are aggravated by dry, dehumidified air. Running a humidifier while sleeping will help control asthma symptoms and lead to better sleep.
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You own wooden furniture. If you own expensive wooden furniture, run a humidifier while you run your AC to prevent the wood from dehydrating. Also, during dry winter months, run a humidifier (even though you probably won’t be running your AC)
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Don’t run a humidifier if:

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There’s recently been a lot of precipitation in your area. Running a humidifier after it rains will expedite mold growth.
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You find yourself sweating more than usual. Humidifiers make it harder for sweat to evaporate, which means you’ll stay sweaty longer.
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You’ve just taken a shower. Just like after it rains, there’s no need to run a humidifier after a large amount of moisture has been added to the environment.
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Run an air conditioner if:

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You want to lower the temperature inside your home. Pretty straightforward, but we’re listing it here just to cover our bases.
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You’re experiencing uncomfortable levels of humidity. While there are specific appliances (called dehumidifiers) to remove unwanted humidity from the air, most modern air conditioners function as dehumidifiers. If you find yourself uncomfortably sweaty, consider lowering the humidity level with your AC.
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Don’t run an air conditioner if:

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You’re happy with the temperature of your home. Again, we expect you know this, but it’s good to check the temperature to make sure your AC is only running when you need it.
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You’re experiencing severe dry skin, dry eyes, a sore throat, or a bout of asthma. Removing moisture from the environment will exacerbate all of these issues.
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Now that you understand the benefits of a humidifier versus an air conditioner, you can make the optimal decision for your home climate. Remember to maintain good appliance hygiene whether you run a humidifier or an AC, and to pay attention to weather reports before deciding to modify your home client. For more AC questions, you can chat with our support team seven days a week. We hope you stay cool and comfortable, and as humid as you desire.

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When picking a window air conditioner, you might think that it’s always better to go with a more powerful machine. But once you’ve figured out the dimensions of your window and which features you need in a unit, there’s one more measurement to take: BTU.

What is BTU? Though it might sound like a K-Pop act, BTU is short for British Thermal Units, an old timey measurement for heat. A single BTU is defined as the amount of energy needed to raise the temperature of one pound of water by one degree Fahrenheit. Since the invention of the BTU, scientists have realized that heat is a measurement of energy, so in science class the BTU has been replaced by the all-purpose energy unit of measurement, the Joule. One BTU is equivalent to about 1055 joules.

But in the AC business, we’re all about tradition, so we’ve stuck with the BTU. When you look at AC units, the BTU they produce will be listed among other specifications. So to return to our initial assumption, why isn’t more BTU always better?

If your AC unit produces too many BTU, it will run on short cycles. Short cycles mean that while your room will cool, it won’t properly dehumidify, leaving you with a clammy, uncomfortable home. Short cycles also constantly repeat the energy spike when your unit turns on, which will actually increase your energy bill. In addition, constantly firing up the compressor for short cycles will burn your AC unit out faster.

Okay! So if too many BTUs are bad, what happens if you pick a machine with not enough? Well, your home will never cool down. Without enough kick, the AC can only cool the area immediately in front of its vents. You might as well not be running anything at all.

Now that we’ve told you the BTU horror stories, let’s go over how to pick the correct amount of BTUs for your home. First, figure out the square footage of the room or rooms you want the machine to cool. Remember, opening and closing doors will affect the functional square footage, so you can modify your floor plan a little bit to optimize your AC unit. If you’ve ever looked up a BTU sizing chart, you’ll see a direct conversion between square footage and the amount of BTUs required.

If only it were simple! Once you’ve found out the BTU equivalent for your square footage, you still need to fine tune the calculation.

The first refinement is ceiling height. Intuitively, with tall ceilings, you have more total area that needs to be cooled. The standard BTU calculation presumes ceilings that are between eight and nine feet. So if your ceilings are higher than nine feet, you need to increase the BTU accordingly. Exact increase amount

After you’ve checked the ceilings, consider what the room is used for. A kitchen is going to have a lot of ambient heat, so you’ll need more BTUs to keep it cool. If you’re cooling a kitchen, machine shop, or home gym, you’ll need to make sure you’ve got the BTUs to counteract that ambient heat. Exact increase amount

The next refinement is figuring out how high the room is off the ground. Ground-level, garden unit and second-floor apartments are all part of the standard BTU calculation. But for every floor past the second, you’ll need to add more BTUs. So while a penthouse might be “cooler” than a garden unit, it’s going to take more power to keep it cool.

Now it’s time to think about sun exposure. Got huge, southern-facing windows? Does your home have “excellent natural light?” As lovely as sunshine can feel, it’s also radiating heat energy. So in order to counteract constant direct sunlight, you’ll need to Exact increase amount

The last bit of fine-tuning in our BTU calculation is occupancy. How many people are in the room you’re cooling? Humans produce a lot of heat. If more than X people are in the room, you’ll need to add X BTUs per person. If you’re having company over, you don’t need to go out and buy a stronger AC unit. But if you’ve got a large family and you all pile into the living room for movie night, then you’ll want an AC that can keep up.

So, it turns out there’s a fair amount of fine-tuning necessary to calculate how many BTUs you need. If you have more questions, our support team is available seven days a week to help you. Remember, when it comes to BTUs, more isn’t always better. Much like Goldilocks, you’re looking for the AC unit that’s just right.

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When it comes to keeping cool, insulating your window AC unit is key. A well-insulated AC runs more efficiently which keeps you cooler and costs less money to operate. Despite the obvious advantages, many people choose to forgo properly insulating their unit, relying on slapdash solutions. Here at Windmill, we’ve seen examples of insulation that include folded towels, taped-up cardboard, and even a pair of rolled-up socks! While any insulation is better than none, properly insulating your unit makes a world of difference. In this blog we’ll cover how to insulate a window AC unit, how to check the seal around your window AC unit, and how to winterize your unit so it can remain installed throughout the year. Even if your unit is already installed, it’s not too late to improve its insulation. As we like to say, “Better insulate than never!”

Insulating a Window AC

So how do you insulate a window AC unit? The primary purpose of insulation is to restrict airflow such that outside air stays outside, and inside air stays inside. As a reminder, window air conditioner units don’t bring in outside air. Instead, they cool inside air and recirculate it through your home. As a result, leaking outside air allows cool air to escape and warm air to infiltrate, which is what we mean when we say a lack of insulation lowers efficiency.

Insulating your window AC starts with properly installing your unit. Make sure to follow the manufacturer’s instructions. If you are unable to follow the instructions exactly, contact the manufacturer to see if they have recommended workarounds. For example, some windows have metal frames, which can make screwing the unit to the window frame impossible without special tools. We’ve also encountered customers who, as renters, aren’t allowed by their lease to drill holes in their apartment. Address any installation issues as soon as possible, as optimally installing your AC will reduce the amount of area that requires additional insulation.

Once your AC is properly installed, it’s time to check the seal around your window AC unit. This is easy on a breezy day; work your fingers around the edge of your window and feel for air leaking in. If you can detect air leaks, mark their location with a piece of tape. If it isn’t a breezy day, you still might be able to feel air leaks with your fingers. You can also ignite a lighter and move it around the edges of your unit. If the flame flickers, it’s likely due to an air leak. The lighter method isn’t foolproof, but it will give you a good sense of where you might need insulation.

Now that you know where the air leaks are, it’s a matter of installing insulation. One of the best types of insulation is flexible foam because it’s easy to cut to the appropriate size. While most ACs include a roll of black insulation foam to seal gaps around your window, at Windmill, we’ve taken this a step further. Our units come with cosmetic side panels that are made from insulated, weather-proof foam. Other types of effective insulation include fiberglass sheets, rolled fiberglass fabrics, and rigid foam boards. For heavy-duty insulation materials, consider hiring a contractor (check out our partnership with TaskRabbit!) if you want some assistance and to guarantee a well-insulated installation.

Even after your unit is fully installed, it’s a good idea to check for air leaks regularly; once a month will suffice. As weather conditions change—usually related to humidity—your window frame can swell or shrink. So remember to check your insulation regularly to make sure your window is still fully covered.

Winter Insulation for your Window AC

While some people prefer to uninstall their window air conditioner during the winter, a well-insulated window AC can remain installed year-round. When figuring out how to insulate your window AC unit for winter, be aware of what type of winter weather you can expect. If you live in an area with heavy snowfall or other extreme weather conditions, you might want to go ahead and uninstall your window AC unit. However, if you live somewhere with moderate winters, read on for tips on keeping your AC unit installed.

The first part of how to insulate your window AC unit for winter is to follow our advice in the first section. While air leaks don’t reduce your window unit’s efficiency in the winter, they will allow cold air in, making your heat less efficient. You can find plastic window film covers at your local hardware store. These easy-to-install sheets cover the entire window, reducing drafts and keeping you warmer. They’re not a good insulation method for when your AC is in use, but make great protection for winter.

You can also get a winter cover for your AC unit. At Windmill, we’ve partnered with a local New York artist to produce a series of stylish covers perfectly tailored to your Windmill AC unit. A winter cover insulates the vents on the back of the unit, protecting them from winter condensation and blocking out drafts from creeping into your home. Many winter covers are reusable and easy to clean, making them an eco-friendly type of winter insulation.

Wrapping Up Wrapping Up

How to insulate your window AC unit is a straightforward question with a wide variety of answers. But that doesn’t diminish how important insulation can be. Remember, a well-insulated AC unit will save you money and keep you cooler during the summer. Winter insulation is equally important for keeping your home warm, and with proper insulation, you can probably keep your window AC unit installed year-round. If you need any additional help, we’ve partnered nationally with TaskRabbit to get you in touch with installation pros. And if you have any questions about your AC or its insulation, our support staff is available to provide you with advice and answers. Just make sure to install actual insulation, and skip on the rolled-up socks!

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The sky is blue, grass is green, and window air conditioners are ugly. These three universal truths are sad facts of life, and nothing can be done about them. Except, anyone who lives in a city can tell you the sky isn’t always blue. During the hottest days of summer, grass isn’t always green. And here at Windmill, we’ve done our best to make an AC unit that, in addition to being easy-to-install and easy to use, are easy on the eyes. But if you don’t have a Windmill (yet!), you may want to know how to hide a window air conditioner or how to make a window air conditioner look better. And even if you have a Windmill, you might want to know how to decorate without reducing your AC’s functionality. In this blog, we’ll go over how to decorate around a window air conditioner, which types of decorations are off-limits, and other tips to ensure that making your home cooler won’t make it uglier.

Don’t Obstruct Vents, Do Maintain Airflow

When decorating around or figuring out how to hide a window air conditioner, the most important thing is to keep the AC functional. As we’ve covered before, an air conditioner can’t operate without intaking air. Make sure the front grille of your AC unit is unobstructed. That means that you shouldn’t place a solid cover over your AC. Likewise, figure out where the vents are on the unit, and keep the decorations away. Even if the intake is functioning, obstructed output vents render your AC ineffective. The same rule applies to the outside part of your AC unit. Without a path for the exhaust to travel, humidity and heat will get trapped inside the AC, killing its efficiency and encouraging mold growth.

When figuring out how to make a window air conditioner look better, maintaining airflow is important. In addition to keeping vents unobstructed, make sure there’s a way for the cool air the unit produces to reach the rest of your home. This is another strike against hanging curtains; even if the vents are unobstructed, they can still trap cool air by the window. Preserving airflow also means keeping furniture and other decorations out of the immediate path of your vents. Otherwise you might end up cooling a very small sliver of your home.

So what are some examples of how not to decorate a window air conditioner? A curtain or drape touching the front grille will get sucked in, clogging intake. Plants with big leaves or fronds also need to keep their distance. If your unit has the vents on top, make sure to keep any decorations off the top of the unit. The same applies to the back of your unit. If there’s a garden behind the unit, make sure no foliage grows too close to the exhaust vents. And if you choose to install your unit in a cage or hutch for additional support, make sure to give the exhaust vents enough space to function.

Movable Furniture is Your Friend

Do you own a folding screen? When figuring out how to hide a window air conditioner, movable furniture is your best friend. A foldable screen or movable curtains are great ways to keep your air conditioner out of sight when it’s out of use.

“But wait,” you might be wondering, “I thought you just said curtains were no good!” That’s definitely true when your AC is running, but when it isn’t, there’s nothing wrong with covering it up. Make sure you install curtain hooks or have a tie to secure your curtains to make sure your AC is fully uncovered when running. Some people who have through-the-wall AC units even have cabinet doors that cover the AC when it’s powered off. Unfortunately, a cabinet enclosure is harder to make work for your window AC, so fully movable furniture is a safer bet.

Another advantage of a folding screen is that, when figuring out how to decorate around a window air conditioner, you can just decorate the screen instead. A lattice screen, or another type of screen with air holes, can even stay in place while your air conditioner is powered on.

What other types of movable furniture can you use? End tables, rolling side tables, and short rolling cabinets all make for excellent cover. You can keep plants or decorations on top of the furniture to further obscure the AC unit. But again, make sure that you can easily unobstruct the AC when turning it on. A perk of end tables is that they can often distract from an air conditioner without obstructing the air conditioner's airflow.

Decorating the Air Conditioner Itself

When weighing the options for how to make your window air conditioner look better, you might want to consider decorating the air conditioner itself. While seemingly simple, this method for making your window air conditioner look better can be tricky to execute. That’s because you need to guarantee any decoration or adornment added to your AC needs to maintain airflow. However, just because it’s tricky doesn’t mean it’s impossible! We have a few tips and ideas for how you can improve your home’s appearance without figuring out how to hide your window air conditioner.

If your AC has a removable front grille, you can paint or decorate the grille. Make sure to use a non-toxic paint and let the paint fully dry before reinstalling the grille on the air conditioner unit. Match the AC to your wall color or room tone, and the unit will barely stick out. Or if you’re feeling artistically motivated, treat the AC grille as an opportunity to make a mini-mural.

Decorating around the vents of your AC is trickier. Vents are often molded as part of the unit and thus can't be detached to decorate. If you have questions about your specific AC unit’s construction, consult your owner’s manual or reach out to the manufacturer directly.

Decorating the Back of your AC Unit

There’s a lot of similarities for how to decorate the inside and outside around your window air conditioner. Air intake isn’t really a consideration for exterior decoration, but unimpeded airflow is just as important. Remember, blocking up the exterior exhaust vents of your unit will inhibit cooling, promote mold growth, and overtax the compressor to the point of failure.

But as long as the exterior exhaust vents remain unobstructed, you can decorate in a lot of different ways! Put plants near the exhaust of your AC and they’ll enjoy the humidity your machine emits. If the exhaust vents are positioned for it, consider setting a planter on top of the unit’s exterior.

Building or installing a short wooden fence is another good way to hide a window air conditioner. A fence will also make it harder for anyone to access your home through the window in which your AC is installed.

If you live in an apartment building (and especially if you live above the first floor), figuring out how to decorate around the exterior of a window air conditioner is tricky. Window decals and decorations hanging from the top of the window frame are two simple ways to make the exterior of a window air conditioner look better by distracting from the unit. Of course, if you’re decorating outside a window, make sure you’re being careful. The last thing you want is your decoration or AC unit falling more than a story!

Putting a Bow on Decorations

No matter which course you choose—decorating around your window air conditioner, hiding your window air conditioner, or making the window air conditioner itself look better—remember to keep the airflow unobstructed and the intake vents clear. While it might be annoying to have a less-than-beautiful window air conditioner, that’s way better than having a broken air conditioner!

And while we’re not usually big on bragging, our searching for a stylish AC is part of what led us to designing the Windmill in the first place. Don’t just take our word for it—check out all the reviews! If you’d like someone to vet your design ideas, or have any other questions about your AC, our support team is available every day of the week to help you keep your home feeling and looking cool.

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As a science textbook will tell you, heat rises. When you are figuring out how to cool down an upstairs apartment, you have to account for several factors. While there are plenty of options for how to cool off an apartment, how to keep a top floor apartment cool in the summer requires paying attention to these additional factors. But just because a top floor apartment is warmer doesn’t mean you have to lose your cool. In this blog, we’ll cover those heat-adding factors and how to cool down an upstairs apartment efficiently and effectively. Figure out which of these tips work best for your home and you’ll be able to effectively chill where you chill out.

Use an Air Conditioner

Okay, duh. We’re an air conditioner company. So when we recommend solutions for how to cool off an apartment, we’re obviously going to start by suggesting installing an AC unit. But it’s worth checking an AC unit off your list before you move on to other solutions. Also, if you are living in a top floor apartment, there are a few additional factors to consider when selecting your window unit.

The cooling capability of an AC unit is measured in BTU (British Thermal Units). Generally speaking, the BTU you need to cool a space is determined by the square footage of the area you are trying to cool. Other factors increase the amount of BTU required, including how high up your apartment is off the ground. So when you’re figuring out how to cool down an upstairs apartment, make sure to select an AC unit with extra BTU to compensate for altitude.

Augment AC with Fans

In addition to installing an AC unit, fans are a great way to keep cool. It’s important to know that, if you’re looking at how to cool off your apartment, a fan doesn’t actually lower the temperature. Instead, fans utilize windchill to make you feel cool. The downside of fans is that, unlike an AC, you can’t pre-cool a room, or lower the temperature of a room and turn the fan off. But the upside of fans is that they’re a relatively inexpensive way to augment the cooling power of an AC, and since you only need to run them when you’re in a room, can help save even more money.

If you’re trying to figure out how to cool down an upstairs apartment without using an AC unit, fans can be an effective method. Window fans can redirect airflow and ventilate your apartment. We’ll go into more depth about airflow later on, but fans can help redirect the air in your home where you want it to go.

Block out the Sun

The sun is hot and radiates heat. That’s why it’s warmer when in direct sunlight than it is in the shade. Apartments at higher floors are sometimes above trees, and receive a lot more direct sunlight than apartments on lower floors. So when figuring out how to keep your top floor apartment cool in the summer, you can start by preventing your apartment from getting too warm.

Keep your blinds lowered during the sunniest part of the day. You can also consider purchasing blackout shades to really keep the heat out. You don’t need to keep your blinds drawn all day long—just figure out when each window receives the most sunlight, and keep it covered during that time. Generally speaking, the sunniest part of the day is from 11 am to 4 pm, but your windows won’t all be direct sunlight at once. If you have a pet cat, you might see them move from sunbeam to sunbeam. Your cat might not like it, but tracking their movement and lowering the blinds will keep your apartment cooler.

Another way to limit sunlight is with plants. While plants won’t absorb heat, they love light. Keeping a few plants in your window or on a balcony will block some sunlight from coming in. In addition, who doesn’t love a little greenery in their home?

Improve Airflow

One upside of living further from the ground is there are fewer buildings and other structures to block the wind. As we discussed in the fan section, while fans don’t solve the problem if you’re looking into how to cool off your apartment, they do keep you cooler. Wind works the same way. Opening windows and letting wind run through your apartment can keep you feeling cool even on hotter days. Using the wind to naturally ventilate a stuffy apartment is an energy-efficient way to cycle the air in your home.

Just make sure you aren’t running your AC while your windows are open! Then the cool air will follow the wind right out the window. Which ties in nicely to our next recommendation on how to cool down an upstairs apartment.

Concentrate the Cool

At first glance, concentrating cool air looks like it’s at odds with improving the airflow. But in a weird way, it’s actually the same solution, just with a different framing. When figuring out how to keep a top floor apartment cool in the summer, try keeping a smaller area cool. If you aren’t going into your bedroom during the day, close the door to block off cool air from migrating to an empty room. The same applies to bathrooms and other rooms you occupy only part-time.

At night, try closing your bedroom door as you sleep. This will keep the cool air in the bedroom with you and block warm air from other parts of your home. By limiting the area you’re trying to cool, you can limit how often you need to run your AC. Keep in mind the BTU of your air conditioning system, as a space that is too small for an AC unit cools inefficiently and will not effectively dehumidify. That said, running your AC with the door open, and then closing the door once your room reaches a desired temperature will help keep the cooler air in one place.

If you have central AC, try closing off the vents to rooms that aren’t in use in addition to closing doors. Got an office that you never go into on the weekends? Shut the vent so you aren’t wasting cool air on an empty room.

Use Vents to Remove Heat

When figuring out how you can cool down an upstairs apartment, there are a few different behaviors you can adopt. One effective and easy to implement change is using the ventilation in your home to get rid of excess heat. When taking a hot shower, run the exhaust vent in the bathroom to suck up extra heat you produce. You’ll get the added bonus of defogging your bathroom mirror.

You can also vent out the extra heat from cooking by running the exhaust fan in your kitchen. Some people only use their kitchen fan when a cooking mishap starts burning! But you can employ the kitchen fan to suck up extra heat from the oven or stove. In most homes, the kitchen is the hottest room, but you can still limit how much heat it pours into the rest of your living space. If your kitchen has a door, shutting the door while you cook might make the kitchen hotter, but it will keep the rest of your home cooler as a result.

Reduce Extra Heat Production

While we’re talking about kitchens, let’s discuss how to cool down an upstairs apartment by never heating it up in the first place. As we mentioned, your kitchen produces a ton of heat while you cook. Eating uncooked meals like salads, or using the microwave instead of the oven or stove dramatically cuts down the heat your kitchen produces. Cookouts are a fun way to cut down on kitchen heat. Don’t have a fancy grill? You can find cheap charcoal grills and have yourself a cookout anyway.

It’s not just the kitchen that makes a ton of heat. If you’re lucky enough to have an in-unit washing machine and dryer, the dryer produces a ton of heat. Which makes sense if you think about it—even on lower heat settings, the dryer still uses a ton of electricity, which releases ambient heat into your home. Try hang-drying your laundry; you’ll save money on electricity and keep your apartment cooler.

Look for Energy Efficient Alternatives

But why stop at the kitchen and the laundry room? When figuring out how to keep a top floor apartment cool in summer, energy efficiency is your friend. In addition to microwaving over using the oven and hang-drying clothes, small optimizations add up to a big difference. For example, every appliance plugged into an outlet produces some amount of ambient heat. Heavy consumption appliances like televisions and computers produce more, but even phone chargers produce some. Unplugging out-of-use appliances adds up to a cooler home.

It can be a pain to remember to unplug each and every appliance when they’re out of use. One easy solution is to make use of outlet splitters. That way, you only need to remember to unplug the splitter in order to unplug all of the attached appliances.

If you’re still trying to solve how you can cool down an upstairs apartment, LED lights can be the answer. LED lights use less energy, produce less heat, and last longer than traditional light bulbs. As an added benefit, many LED lights can be programmed to turn off automatically, so you don’t have to worry about leaving the light running through the night.

Dehumidify

No one likes humidity. When planning how to cool down an upstairs apartment, humidity is a wildcard. Even if you successfully lower the temperature, a humid home will feel hotter than a home at the same temperature from dry heat.

Humidity is how much water vapor there is in the air. You might see humidity expressed as a percentage, like 78%. The percentage refers to the relative humidity of the air. 100% is the dew point, at which the water vapor would be so saturated in the air that it would precipitate. With regards to relative humidity, anything approaching 60% or higher feels uncomfortable. So when you’re looking into how to cool off your apartment, reducing humidity goes a long way.

So how do you reduce humidity? Running an air conditioner dehumidifies the air in your home. For additional dehumidification, you can purchase a standalone dehumidifier unit. But before you purchase a dehumidifier, try out these solutions:

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Open windows and run fans to circulate air. Circulating air will disperse the water vapor and lower humidity.
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Use your bathroom vent while showering. Hot water evaporates, so the air receives an influx of water vapor after a warm shower. Taking cooler showers and running the vent lowers humidity.
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Make a natural dehumidifier. Charcoal naturally absorbs moisture, so leaving a small jar of charcoal in your home will take humidity out of the air.
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Limit the number of indoor plants. Plants produce humidity after they receive water, so keep them outdoors, or decorate with succulents and other low-water plants.
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White Furniture Reflects Heat

Bright colors are a huge help when figuring out how to cool down an upstairs apartment. White furniture might get dirty easily, but it’s harder to warm it up. Light colors reflect light, while darker colors absorb more light. And as we covered previously, sunlight is heat. If you’ve ever sat on a hot leather couch, you know exactly how heat gets trapped in furniture. In fact, this same color principle is why white cars can run their AC less than black cars.

You might wonder: if white reflects heat, then why do we recommend blackout shades as a way to cut down on heat? That’s because blackout shades absorb the light and heat that would come in through the windows. Your furniture is already in your home, so it can’t block out heat. But by absorbing heat, your furniture will retain some of that warmth even as you try to cool down the rest of your home.

Stay Cool

If you can’t figure out how to cool off your apartment, cool yourself off. Just as cooling down one room takes less effort than cooling a multi-room apartment, cooling yourself can be easier than cooling your home. Wearing loose-fitting clothing made of breathable material will help you keep cool in the summer, as will taking cooler showers. Eating cold foods and drinking iced beverages also provides relief from the heat.

Have you ever put a sweater in the dryer before wearing it on a cold day? You can achieve a similar but opposite effect by refrigerating your sheets before bed. Your body heat will warm the sheets, but not before they cool you down.

Heat Check

These are just some solutions for when you’re trying to figure out how to cool down an upstairs apartment. While you might not be able to adopt all these solutions—and some will be best implemented at different times—try out as many as you can to figure out which solution works best for you.

There are tons of benefits to living in an upstairs apartment. It’s hard to beat an on-high view of your city or town. Higher apartments are further removed from the sounds of the street and traffic. So don’t let all this talk of how to keep a top floor apartment cool in summer scare you from moving into a loft!

Remember that keeping cool is as much about behavioral changes as it is about technological improvements. Get in the habit of using less heavy-consumption appliances and unplugging appliances that are out of use. Close doors to empty rooms and run fans in the room you’re occupying. If you have questions about optimizing how cool your home is, our support team is available every day of the week to help you out. Our specialty is cool temperatures, but we can also rate your aesthetics, if you ask nicely.

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Wildfires are more common now than ever before. According to a study performed by the University of East Anglia, wildfire season increased by 27% between 1979 and 2019, which is equivalent to two more weeks. While the overall area consumed by wildfires has decreased over this period, specific regions like the northwestern United States saw a major increase in acreage consumed by fire.

Since global temperatures are predicted to continue to rise, more areas will be at risk from wildfires. In addition to the risk of fire damage, wildfires spread dangerous smoke well beyond the area of the fire. Certain weather conditions, most notably high winds, can carry wildfire smoke across county and state lines. In fact, if a fire is powerful enough to launch its smoke into the stratosphere, that smoke can travel thousands of miles. Smoke from the 2021 Bootleg Fire in Oregon reached the eastern United States, settling over Philadelphia and New York City.

As we adjust to this new normal, it’s important to understand how we can protect ourselves from wildfires and wildfire smoke. This blog will explain how smoke enters your home, and answer questions like “Do air conditioners filter wildfire smoke?” In addition, we’ll cover different types of air conditioners, explaining how portable ACs might not filter smoke while window unit ACs do filter smoke. As always, in a crisis situation you should pay attention to local emergency services and follow the directions of the authorities. And remember, because of how well smoke travels, you should be familiar with wildfire smoke safety even if you don’t live in an area with a high incidence of wildfires.

Why is Wildfire Smoke Dangerous?

We know that wildfire smoke spreads far beyond the fire itself, but why is it dangerous? Understanding the dangers of wildfire smoke is part of understanding whether AC units do or don’t filter smoke.

Smoke is made up of gasses and fine particles produced from the burning of organic materials, like wood. According to the Environmental Protection Agency, the greatest risk from smoke comes from the fine particle component. These fine particles—which you can think of like a microscopic version of ash—enter your eyes and respiratory system. They can cause irritation to your eyes and lungs, and prolonged exposure can cause serious illnesses like bronchitis. If you have a chronic health condition affecting your hearts or lungs, the particles will aggravate your pre-existing condition.

As our high school health classes taught us, smoking is bad for you. Part of the problem with factory cigarettes is the additional chemicals beyond tobacco which have been added to the cigarette. Even if wildfire smoke was composed entirely of organic particles from plant matter and wood, it would still be harmful. But wildfires don’t discriminate. They’ll burn anything in their path, adding plastics and other harmful compounds to their smoke. Even if you are a healthy person without respiratory or pulmonary issues, inhaling wildfire smoke is a serious risk to your well-being.

Other specific groups at-risk from smoke inhalation are young children, the elderly, and pregnant people. Especially for those who are pregnant, smoke inhalation can cause complications in the pregnancy which can result in long-term health issues for both the child and the parent.

How Wildfire Smoke Gets In

As we’ve covered in separate blogs, the laws of thermodynamics dictate that hot air will always naturally move towards cool air. Smoke isn’t hot air—it’s tiny particles of matter that were burned to fuel the fire. However, smoke rises because the heat from the fire heats the air which carries the smoke. This is all to say that, if your home is cooler than the outdoor air, hot air will attempt to carry its smoke into your home.

According to the Environmental Protection Agency, Wildfire smoke has three ways of entering your home. They are:

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Natural Ventilation: Smoke entering through open windows or doors
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Mechanical Ventilation: Smoke entering through devices like kitchen fans or bathroom vents, or through heating, ventilation and air conditioning systems that intake outside air
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Infiltration: Smoke entering through small cracks in exterior walls or leaks in windows or doors
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Preventing Smoke from Entering Your Home

To prevent Natural Ventilation, keep doors and windows shut when there is a smoke risk. Look into weather strips and other types of insulation to augment the natural seal of a door or window. In a pinch, hang wet towels or extra sheets over exterior doors and windows for additional insulation. While it might be tempting to open up a window to allow for airflow to reduce the smell of smoke, you risk letting much more smoke into your home.

Preventing Infiltration is much more difficult, and hard to do when in an active wildfire scenario. If you live in a home, consider hiring a contractor to perform an energy audit. This will involve checking the perimeter of your home for any potential air leaks. While energy audits are designed to make your home more energy efficient, they will also detect leaks and cracks that allow for smoke infiltration. If you find yourself with a leaking home in a wildfire situation, do not attempt to perform an outdoor energy audit yourself. If you can tell where smoke is entering your home, hang a sheet or wet towel to act as an additional filter. Run an indoor fan to circulate the air in your home, which will mitigate some of the harmful effects of smoke.

The easiest way to prevent Mechanical Ventilation is to stop using devices which allow for smoke to enter your home. Avoid using kitchen fans or bathroom vents during a wildfire. If you happen to have a chimney, make sure the flue is completely shut, and if possible, replace the flue cap with a solid cover.

One major cause of Mechanical Ventilation can be your HVAC system. Considering that wildfires are common during the summer, it’s likely that you’ll be running your AC during wildfire season. But whether or not this puts your home at risk for smoke will depend on the type of air conditioning system you have. In order to answer the question “do air conditioners filter wildfire smoke?” we first have to know which type of air conditioner you have.

Which Types of AC Bring Smoke In?

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Central Air Conditioning: Also known as split-system air conditioning, central air conditioners use an outdoor compressor to route cool air through indoor vents. The compressor works entirely with indoor air, which means that Central AC doesn’t bring outside air into your home. However, because Central AC requires vents throughout your home, it’s possible for a Central AC system to circulate smoke or other pollutants via the ductwork.
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Window Air Conditioning: Our forte here at Windmill, Window Air Conditioning works by intaking indoor air, cooling it, and then shooting heat exhaust out the window. Window Air Conditioners don’t intake outside air, but with improper insulation can allow outdoor air into your home. Poor insulation normally reduces the efficiency of your AC, but in a wildfire situation can bring smoke into your home. Window AC units do filter smoke, but only if it is already inside your home.
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Portable Air Conditioning: Some portable air conditioners—single hose portable ACs—work like a combination of a window unit and central air. The unit sits inside your home, and uses a fan to draw in air like a window AC. Then, using its hose, the unit vents the exhaust outdoors like a central air system’s ducts.
However, other portable air conditioners—notably dual hose portable air conditioners—actually intake outdoor air to cool. A dual hose portable AC should not be operated in wildfire conditions, because it will bring smoky air into your home. Even though dual hose portable AC units filter and cool the outdoor air they use, it is still dangerous to bring smoky air into your home.
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There are other types of air conditioning—like through-the-wall units—but those operate similarly to one of the three types above. Very few types of air conditioning actively bring in outside air, so most are safe to operate in wildfire conditions. However, you need to be careful. When not in use, air conditioning provides a path into your home for smoke.

If you have central air conditioning, consider closing the vents when the unit is not in use. This will prevent any smoke that enters your home from circulating. For window air conditioning units, try running them on the fan mode. This will not bring in outside air, but circulate the air inside your home. For portable air conditioners, consider uninstalling them when not in use. Some portable ACs also provide the ability to close the hose, limiting the outdoor air that can seep into your home. And remember, if you have a dual hose portable AC, do not use it in wildfire conditions.

How Do Air Conditioner Units Filter Air (and Smoke)?

Regardless of the type of air conditioner you use, the filtration process will be roughly the same. AC units use fans to intake air. Before that air reaches the cooling mechanism of the AC, it’s run through a filter. Different ACs have different kinds of filters. Central air filters are often disposable, while some window air conditioner units, like the Windmill, have reusable filters. The filters comb dust motes and other particles out of the air, removing them from circulation in their home. Notably, you must replace or clean a filter in order to fully remove the filtered material from circulation; otherwise it just builds up in the AC unit until the filter clogs.

A filter will only catch particles that are larger than the holes in the filter. Think of a filter like a birdcage—if the bars are too big, the bird can fly right through. A standard AC filter is designed to catch dustmotes, pet dander, and pollen. While those aren’t large particles, they are significantly larger than most of the fine particles in smoke.

Some air conditioners utilize a second filter system to catch more pollutants. The Windmill uses a second filter made of activated carbon, which has adsorptive properties. The activated carbon filter is more effective at filtering out smoke’s dangerous fine particles.

Many consumers are curious about installing a HEPA filter in their AC units. HEPA, which stands for High Efficiency Particulate Air, is the standard in medical settings. HEPA filters entered the public consciousness during the COVID-19 pandemic, when people became concerned with filtering infected air out of their home.

While HEPA filters are good in medical environments, they don’t work with most air conditioning systems. The reason has to do with their MERV rating. MERV (minimum efficiency reporting values) ratings are a standardized system for identifying how well a filter can capture particles between .3 and 10 microns in size. For reference, a particle of wildfire smoke can average between .4 and .7 microns in size. A HEPA filter has a MERV rating 17 or higher, which means it can capture 99.7% of particles between .3 and 10 microns in size.

So why is a HEPA filter bad for your home AC? The highest standard MERV rating for a central AC box filter is 13. A more restrictive filter—especially a highly restrictive HEPA filter—will reduce the airflow and impede the functionality of your HVAC system. If you’re concerned about quality in your home, consult with an HVAC expert to see about installing HEPA-grade filters in a separate air purifier.

Do Air Conditioners Filter Wildfire Smoke?

So now we return to our initial question: do air conditioners filter wildfire smoke? The answer is a heavily qualified yes. Most air conditioners cool and recirculate indoor air. In doing so, the air is run through the air conditioner’s filter, which will remove larger particles. However, as we’ve explained, an air conditioner filter is insufficient to fully filter smoke particles out of the air. Furthermore, since your air conditioning likely only intakes indoor air, the amount of smoke filtration it provides is minimal.

Instead of focusing on whether or not an AC unit filters wildfire smoke, your primary concern should be insulating your home against smoke entering in the first place. As we discussed, there are three main ways smoke enters your home: Natural Ventilation, Mechanical Ventilation, and Infiltration.

If you want to obtain additional smoke protection, consider purchasing an air purifier or filtration device for your home. Many air purifiers or portable air cleaners work with HEPA filters, making them an excellent measure to reduce smoke in your home and improve indoor air quality. If you live in an area that is downwind of fires, invest in N95 respirator masks and take other precautions to limit your smoke inhalation.

When facing a smoke emergency, limit activity which will produce additional fine particles. Smoking, frying or broiling food, and using a gas or wood-burning stove or furnace can all contribute to indoor air pollution. In addition, limit your use of aerosols, and avoid vacuuming unless your vacuum has a HEPA filter attached to it. Even if you can smell smoke, avoid burning candles or incense to cover the odor; these flammables release a large amount of fine particles into the air which limits your ability to filter out smoke.

Remember, wildfires are a danger to those beyond their immediate vicinity. When facing a wildfire or an intense smoke event, follow the directions of local authorities and government environmental agencies. Wildfire smoke is a serious risk, but with preparation and caution, you can mitigate the danger to you and your loved ones.

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Everyone’s AC makes noise. The fan and the compressor both produce sound while they’re running. But not all AC noises are created equal. If your air conditioner is making a whistling noise inside your house then something is wrong with your AC unit. In this blog, we’ll cover air filter whistling noise, air flow whistling noise, and other sounds which signify something is wrong with your AC unit.

Dirty Duct Ditties

You know the expression, “clean as a whistle?” Well, if your AC is whistling, then most likely it isn’t clean. When you purse your lips to whistle, you’re limiting the airflow to create a shrill note. The same principle applies to a referee’s whistle in a football game. The ref blows air into the whistle, but the air gets backed up and caught inside the whistle’s body. The air bounces around, looking for an exit, and finally escapes. But because the air is so compressed, it escapes as a high-pitched note.

Ok, but what does that have to do with an AC unit? Well, there’s a chance your air filter is mimicking the focusing function of the ref’s whistle. If your air conditioner is making a whistling noise inside your house, take a look at your filter. As your AC unit’s fan pulls air into the unit to cool down, if there is enough debris in the filter, the air is forced through a narrow opening. In that way, the air filter makes a whistling noise. If you think your air filter is making a whistle noise, stop using the unit and clean (or if disposable, replace) your filter. Your AC unit works way more efficiently—and quietly—with a clean filter.

But the filter isn’t the only part of the unit that whistles when clogged. Your AC releases cool air through vents positioned around the body of the unit. If those vents are clogged, you can hear more shrill whistling. A dirty air filter’s whistling noise comes from the air in your home; a dirty vent’s whistling noise comes from the air inside your AC unit. In both instances, the whistling is a sign that the unit is wasting energy and inefficiently cooling your home. For split system air conditioners, whistling can indicate a blockage in the ducts or room vents. Anywhere air flows can potentially turn into a whistle with enough backup. The larger your AC system, the more possible clog locations.

It’s important to remember that dirt and other debris aren’t the only potential clogs in your cooling system. Window curtains, household plants and even random pieces of paper can get sucked up into your AC unit’s cooling network. But whether it is blocked vents or a clogged air filter that is making the whistling noise, you’ll want to clear the clog as soon as possible.

Melody of Mismatched Mechanisms

This issue only occurs in older, split system air conditioner units, but it’s definitely something to check if your air conditioner is making a whistling noise inside the house. As parts of a split system AC break down, it’s not uncommon for technicians to repair the failing parts. For example, if a duct corrodes and starts leaking air, there’s usually no need to replace the entire AC. However, mismatching ducts or other components of a split system AC can leave gaps in the circuit or insulation. And these gaps provide the perfect opportunity for your air conditioner to start whistling.

Misaligned ducts are another, similar problem. Earthquakes or even some heavy winds can shake a home enough to knock ductwork out of alignment. When this happens, there’s a chance to create whistle conditions, as the ducts no longer feed cleanly into each other. After a severe weather event, it’s a good idea to check your HVAC system to ensure that everything is still running correctly and the airflow through the system remains unobstructed.

When considering the circuit in your AC system, remember that it’s larger than just your AC unit and the ducts. Every door in your home impacts the airflow through your AC system. So if you hear a faint whistling noise, it could be that the doors are blocking off airflow to intake vents, creating a whistle effect as the AC tries to draw in more air to cool.

Compromised Compressor Concertos

If you’ve read a lot of our blogs on AC maintenance and troubleshooting, you might suspect the compressor is the source of that irritating whistling. And while we never want to say never—we’ve seen a lot of different AC situations—it’s pretty unlikely that your AC compressor makes a whistling noise.

As we’ve explained, airflow is necessary to create a whistling sound, and air doesn’t really flow through your compressor. But let’s say you’re confident your AC compressor is making a whistling noise; what could that mean? Well, the compressor works by applying pressure and heat to the refrigerant in your AC unit, which turns the refrigerant into a gas. If your AC compressor is making a whistling noise, that would mean there is a leak somewhere in the refrigerant line so that either air is getting in, or pressurized refrigerant is leaking out.

As we said previously, this is extremely uncommon and would only occur in a rare situation where your AC took a lot of physical contact. We’re bringing it up because many customers know about the dangers refrigerants can pose, and are worried about possible refrigerant leaks. If you have reason to suspect your refrigerant is leaking, stop using your air conditioner immediately. If, for example, you hear whistling and then your AC shuts itself off, it’s possible that your unit detected a refrigerant leak. So the good news is that your AC’s sensors worked correctly, but the bad news is that you wouldn’t be able to use the AC until the refrigerant leak is resolved.

Again, refrigerant leaks are uncommon and are accompanied by many warning signs beyond just a whistling sound. You shouldn’t assume there is an issue with your AC compressor If you hear a whistling noise.

Additional Acoustic Antagonism

Okay, but let’s say you aren’t hearing a whistle. What about grinding noises? Or whining noises? Or what about the dreaded splash? It can be difficult to convey a sound in words, but we’ll briefly go over some places to check when you hear different, troubling noises.

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Scratching: This is a sign that the internal mechanics aren’t running smoothly. The fan might be off its axle, for example.
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Grinding: Another sign there’s an issue with the internal mechanism. The fan could be running into some sort of interference as it spins, or the compressor could be misaligned.
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Banging: Usually a sign that an internal component is loose. Over time, parts of the AC unit wear down, and could potentially come loose.
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Buzzing: Buzzing can be caused by debris loose inside your AC unit.
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Clicking: Clicking can be caused by a rotational issue with your fan, an electrical issue sending faulty signals, or a power issue causing electrical failure.
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Rattling: Rattling could be a sign that your AC unit is about to give up the ghost. However, rattling can also come from debris loose inside the unit.
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Splashing: If you hear splashing, that means part of the unit’s mechanism (most often the fan) is hitting moisture that has collected within the unit. This means there’s an issue with your unit’s drainage.
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Tone-Deaf Troubleshooting

If you hear any unexpected sound from your AC unit, it’s a sign that something is wrong. We’ve gone in-depth on what could be wrong when your air conditioner is making a whistling noise inside your house, and the differences between air filter whistling noises and other types of whistling noises, and what other troubling sounds might signify.

If your air conditioner is making a whistling noise inside the house, try to resolve the issue before resuming operation. Many of these issues, if exacerbated, can cause larger problems for your air conditioning system. If you have more questions or need help troubleshooting, our support team is available seven days a week to assist you.

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What is Freon? Is Freon dangerous? Where can you buy Freon? Should you be adding Freon to your AC unit? And what do all these weird letter/number combos like R-22 mean? For many of us, Freon is a word we’ve heard (and received warnings about) but not something most people can identify. This blog will teach you everything you need to know about Freon, refrigerants, and safety regarding these chemicals.

So first things first: what is Freon? Freon is a brand-name and registered trademark for a group of refrigerants owned by the Chemours Company, a spin-off of DuPont. The Freon refrigerants were created to replace more toxic chemicals like ammonia. Chemically, Freon refrigerants were chlorofluorocarbons (CFCs), compounds of carbon, hydrogen, chlorine, and fluorine. DuPont created a system to catalog the various Freon refrigerants so they wouldn’t have to repeatedly use the tongue-twister chemical names. The first Freon was dichlorodifluoro- methane, which DuPont called R-12. These days, the Freon trademark applies to R-12, R-13B1, R-22, R-410A, R-502, and R-503.

Okay, so we know what Freon is. But why were companies adding Freon to AC units? Refrigerants like Freon play an integral role in how an air conditioner functions. The three main mechanical elements of an air conditioner are the condenser coil, the evaporator coil, and the compressor. For a bigger breakdown on how AC units work, check out our blog on the subject here. The refrigerant cycles through these three mechanical elements, picking up heat and shedding it so that your AC unit can create cool air. Refrigerants are chemically designed so they excel at changing state and absorbing heat. Without a refrigerant like Freon added to your AC unit, you’d have a very inefficient window fan.

Many people use the word Freon synonymously with refrigerant, the way that some people use Kleenex to refer to all facial tissues. But it’s important to know that what is Freon and what is a refrigerant are not synonymous. In 1987, the countries of the world signed a treaty that has come to be known as the Montreal Protocol to restrict the usage of CFCs (including Freon). While CFCs are less toxic for humans, they contribute greatly to the depletion of the ozone layer. As air conditioners and refrigerators became more common, the governments of the world decided action was necessary to protect the environment.

Hydrofluorocarbons (HFCs) were chosen to replace CFCs, but part of the Montreal Protocol was a plan to phase these refrigerants out as well. The Kyoto Protocol, a second international climate agreement, further restricted the use of HFCs. Chemists have developed new refrigerants, like R-32, with lower global warming potential. So if you’re someone who uses Freon and refrigerant interchangeably, your definition of what is Freon is evolving and will continue to do so.

So if companies were adding Freon to AC units to make them safer, why does Freon still have a bad reputation? While Freon might be less toxic than the refrigerants it replaced, it is still a dangerous chemical. Likewise, while HFCs are less dangerous to the environment, they can still be dangerous to humans. In addition, Freon and other refrigerants are tasteless and mostly odorless, making them perfect bogeymen for home-related fears.

Fortunately, most modern machines are built so that refrigerant leaks are extremely uncommon. In order to suffer from refrigerant poisoning, you would need prolonged exposure to a large quantity of refrigerant for a significant period of time. This isn’t to say you should start splashing refrigerant on yourself—please don’t do that! But if you’re worried about a refrigerant leak, you don’t need to panic. If you see a liquid leaking out of your AC unit’s vents, don’t worry! It’s common for air conditioners to leak a small amount of moisture because they condense the water molecules in the air.

When should you be concerned about a potential refrigerant leak? If your AC unit is in operation but not cooling, and you can hear the compressor engaged—meaning it’s making the same amount and kinds of sound as usually does—then there’s a chance your unit is low on refrigerant or leaking. Stop using your air conditioner and contact a professional to come in and check out the unit for potential issues.

So what do we know about Freon, refrigerants, and the way they are used? Refrigerant chemicals are essential to the functioning of air conditioning systems. Companies began adding Freon to AC units as a non-toxic alternative to traditional refrigerants. While it was widely used, Freon has been phased out in favor of refrigerants with a lower global warming potential, like R32, which we use at Windmill. Scientists around the world are constantly working on new refrigerants which are even more environmentally friendly. While Freon and other refrigerants are safer for humans than traditional refrigerants, prolonged exposure to any refrigerant can be dangerous. However, refrigerant leaks are extremely uncommon, and easily handled by professionals. If you have any other questions about refrigerants or how your AC is functioning, Windmill support is available seven days a week to help you out. For more information on how Windmill is fighting for a greener future, check out our environmental initiatives here.

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Pick the right machine for the job

Properly maintain your machine

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Make sure your unit is properly installed and insulated. If there are gaps in the insulation, your unit will have to work harder to keep your home cool. Likewise, improperly installed units can suffer from improper drainage, which can lead to issues like mold.
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Regularly check your filter! Most modern AC units come with a check filter light to let you know when the filter requires an immediate swap. However, it’s a good idea to check your filter more regularly. How long an air conditioner filter lasts will depend on many factors, but a good rule of thumb is to check the filter at least every month.
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Replace your filter when necessary. The Windmill AC has a dual filtration system, with a washable mesh filter and a replaceable activated carbon filter.
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Check the vents of your machine to make sure they stay clean. Clogged vents will make your AC work harder than necessary, which will shorten the lifespan of its internal mechanism.
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Practice smart AC usage. When you leave home, make sure to turn the unit off so you don’t cool an empty room. On more temperate days, shut off your AC to give the machine a break.
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Understand the climate you live in

Where you live, and what type of climate you live in, will have a major impact on how long your air conditioner lasts. If you live on a coast, ocean salt in the air can cause your condenser coils to corrode or otherwise wear out faster. Similarly, very humid environments foster mold growth, which will also shorten the lifespan of your window unit. When purchasing a new AC unit, you should adjust expectations for the machine’s lifespan to fit your climate.

Determining when it’s time to replace

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As spring turns to summer, people turn up their AC to fight the heat. As you crank the AC, you might notice your throat is getting sore. Pollen and other plant allergies peak during the warm months, but let’s say you’re lucky enough to not have any allergies. The culprit behind your sore throat and other allergy-like symptoms might actually be your air conditioning. Read on to learn some tips to prevent a sore throat from your air conditioner.

Fix up your filter!

If you’re getting a sore throat from your AC, the first place to check is your filter. We’ve written a lot about filter health, but that’s because a clean filter is crucial to make sure your AC is properly functioning. A dirty filter is a breeding ground for bacteria, and too much build-up will cause the filter to break down and let some gunk through. Your AC will then circulate the dirty air through your home, which can lead to a sore throat from air conditioning.

That’s why most modern window ACs include a “Check Filter” light. But if you think you might have a sore throat from your AC, the filter is a likely culprit. It’s a good idea to check your filter every month to see if too much gunk has built up.

This is one reason why we designed the Windmill AC with two filters. Our reusable mesh filter grabs larger particles and prevents your AC from recirculating dust and other allergen particles through your home. The mesh filter is washable—so when you see there’s a detritus buildup, give the filter a quick rinse (and dry it out!) and you’ll be back to breathing clean air in no time.

The second filter is made from activated carbon. Activated carbon filters air through the process of adsorption. We go into more detail about our carbon filters and adsorption here. But the short version is that a carbon filter grabs pollutants and volatile organic compounds out of the air, keeping your AC from recirculating them. If you’re particularly sensitive to allergens, consider adding a carbon filter to your home system. The filter can make a huge difference if you think you’re getting a sore throat from air conditioning.

Bring new air into your home!

But let’s say you’re a filter pro, and you still think you might be getting a sore throat from your air conditioner. It’s possible that you’ve dehumidified the air in your home too much. If you keep all your windows closed and run your AC regularly, you’ll continually lower the amount of moisture in the air of your home.

Dehumidification can be a tricky balance. Too much humidity, and it won’t feel like your home is cooling at all. Humid air also carries more allergens and pollutants, because the water in the air is great at bringing unwanted passengers along. However, without any moisture in the air, you will dry out your skin, irritate your eyes, and possibly give yourself a sore throat. So if you think you’re getting a sore throat from your AC, there’s an easy fix: open a window.

Remember, a properly installed AC operates on a closed circuit. Introducing new outside air to the system will introduce moisture back into your home’s air. Your AC will go to work filtering and dehumidifying the air, back to levels that work for you.

Opening a window can help prevent you getting a sore throat from air conditioning. But it’s also helpful to reduce your AC use, which will save you money, too. On nicer days, try keeping the windows open—your wallet and your throat will both be grateful.

Don’t let mold take hold!

Alright: you’ve checked the filter and made sure to circulate fresh air into your home. So far, everything seems to be in order. But you still think maybe that you’re getting a sore throat from your air conditioner. Perhaps while checking the filter, you noticed a bit of gross slime inside your AC unit. This is the worst case situation: you’ve got a mold infestation inside your window AC. Mold produces a lot of spores which can cause respiratory issues, and if mold is growing inside your AC, that means you’re unwittingly spraying those mold spores around your home every time you turn your AC on.

When it comes to fighting mold, an ounce of prevention is worth a pound of cure. Here’s three easy steps to prevent mold from finding a home in your home. For more info on preventing mold, check out the other sections of this article.

If you notice mold growth in your window AC, stop using the unit until you can properly clean away the mold. In a well-ventilated area, equip yourself with some kitchen gloves and protective eyewear. Make sure the unit is disconnected from power and wipe up the visible mold with a mild household cleaner and water. Make sure the unit is completely dry before resuming operation.

It can be difficult to deal with mold yourself, so think about contacting a professional before attempting a fix. However, mold growth might lead to a more serious condition than a sore throat from your AC, so make sure to stop using your AC until the issue is resolved.

Double-check your installation!

If you think you’re getting a sore throat from your AC, it might be the case that your AC isn’t properly installed. If you’re prone to a sore throat from allergies, this is an especially likely occurrence. Without proper insulation, allergens like pollen can enter into your home through the window in which your AC unit is installed. Because the allergens are entering your home next to your AC, they are more likely to get sucked up by the unit’s intake, and can then be redistributed around your home.

When installing an AC, try feeling around the edges for air leaks. We’ve designed the Windmill AC to be easy to install, with double-layered insulation you can adjust to fit your specific window size. If you notice any air leaks, cover the openings with additional insulation. In a pinch, you can use painter’s tape to cover up any cracks. However, you may need to uninstall and reinstall your window AC to properly insulate the window and prevent outdoor allergens from entering your home.

Putting it all together

How can you tell if your sore throat is caused by your air conditioning? Try to track when your throat is irritated. If you are only reaching for lozenges when you’re at home, then probably something in your home (like your AC!) is to blame. Conversely, if you only notice your throat is sore when out and about, an allergy is a much more likely cause.

A sore throat from air conditioning isn’t really caused by air conditioning. The real culprit is a poorly maintained home air system, whether that means leaving dirty filters installed or preventing new air from entering into your home. If you practice good air conditioner hygiene, you’re most likely doing enough to prevent any of these causes from occurring.

Following this advice will help you keep your machine (and your throat) in good working order. If you’re unsure how to check any of these factors, or if you have any other questions about your window unit AC, our support staff is available seven days a week to help. They’re also available to assist you with any other issues you might be experiencing.

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Built to break: every consumer’s three least favorite words. We’ve all had phone batteries give up the ghost the day after our warranty expires or other machines that simply stop working. While there is no International Air Conditioning Illuminati planning obsolescence for window units, many AC units are recycled before it was their time to go. We’ll go over how to maintain your AC unit, so you can ensure your window unit lives a long (and functional!) life. As a nice side bonus, these tips can cut back on your electric bill, help you avoid AC maintenance service, and do right by the earth.

1. Read the Owner’s Manual

According to a study performed by professors from NC State and Rice University, fewer than three out of five people ever open the owner’s manual for a new car. For those three, they only read a little more than half of the manual before tapping out. The owner’s manual or operating guide for an air conditioner is not going to be as long as the booklet for a new car. Take the time to give it a read!

We’re not just saying that because some of us wrote the manual for Windmill. There are features built into most modern air conditioners that are designed to reduce energy consumption by running the compressor less often. Compressors, like all machinery, wear down over time with use. Your owner’s guide should describe different ways to improve operational efficiency, as well as tips for installation and troubleshooting.

If you bought your unit secondhand, or don’t have the manual, try reaching out to the manufacturer for assistance. At Windmill, we have support staff available seven days a week to help with air conditioning unit maintenance.

2. Maintain the Filter

We’ve waxed poetic on the importance of filters before, so definitely give that article a read for a more comprehensive breakdown. Let’s start with the scary stuff: if the filter on your air conditioning gets too gunked up, your air conditioner will have to work harder to draw air into its system. This overtaxes all that machinery we were just talking about and can even lead to your unit burning out completely.

If you ever see ice forming on your air conditioner, you don’t need to call an AC maintenance service. A clogged filter might be the culprit, so start by checking there. The Windmill has a filter alert that lights up when there’s too much build-up. It’s a good idea to check your filter every month, so you can catch issues before they happen. Examine the filter for any tears before putting it back in your unit.

The Windmill comes with a reusable mesh filter that’s easy to clean off. For units with disposable filters, make sure to keep them stocked and change them every month. You can prevent a lot of air conditioning unit maintenance just by practicing good filter hygiene.

3. Install Your Unit Like a Pro

If you’re wondering how to maintain an AC unit, start from the beginning. Incorrectly installing an AC can cut the unit’s efficiency in half and jack up your energy bill. And as we’ve discussed, the harder your machine has to work, the shorter its operational life.

Make sure you read the installation guide or owner’s manual for your AC before you begin the installation. Some machines require specific support brackets or have other requirements for installation. You want to ensure the unit sits squarely on the window sill so you can close the window as much as possible. Thoroughly insulate any gaps between your air conditioner and the window frame. Without insulation, any cool air will literally go right out the window.

Where you install your unit also matters. Installing a unit on a south-facing wall, or anywhere that receives a ton of direct sunlight can fry your air conditioner. Inside your home, make sure your AC’s vents are completely unobstructed by any furniture or wall hangings. Make sure to tie your curtains all the way back so they don’t get sucked into the air conditioner by your unit’s fans.

Watch out for branches outside your window. Trim back any tree branches or foliage that gets within a foot of your unit. Blocking the exhaust vents can cause your unit to overheat or grow mold. The mold grows when the moisture your unit produces gets trapped inside. Mold is gross, and also really bad for the more delicate components with an air conditioner.

If you have weird windows or aren’t comfortable with DIY projects, consider hiring a pro to install your air conditioner. At Windmill, we offer premium installation for customers who live by us in New York City, and have paired nationally with TaskRabbit to make sure our customers can get their air conditioner in their window. Installing your air conditioner correctly will save you headaches and AC maintenance service down the road.

4. A Clean Machine is a Healthy Machine

If some of these tips on how to maintain an AC unit sound suspiciously like how to clean an AC unit, well, you caught us. Keeping your unit clean helps with operational efficiency and helps preserve your unit’s internal machinery. We’ve already discussed how crud building up on your filter hurts your AC, but the same is true for its vents, as well.

Use a damp rag to clean dirt and other debris off the vents off your unit. It’s not just unsightly—dirt and other debris will enter your unit through the vents, and then ricochet around inside, damaging different components. Remember that mold we talked about earlier? If too much moisture accumulates in your AC, it might start producing slime.

Okay, enough of the horror talk: how do we deal with it? If you can see standing water in your unit, first, find a helper. With your helper, carefully raise the window sash and tilt your unit backwards so the water empties out. Just make sure there’s no one below you before you start tilting!

If there’s some type of fungal growth in your unit, dilute half a cup of bleach in a gallon of water. Remove your unit from the window and set it on some towels or newspaper. Carefully pour the solution into the unit via the vents. Tilt the unit to empty out any of the solution and let it dry completely before putting it back in the window and resuming cooling.

When you store your AC, wrap it in a protective cover before putting it in a box. This way, you’ll have two layers of protection against dust, moisture, and impact damage. We go into more depth on storing your air conditioner here. If your air conditioner has been off for a prolonged period of time, dust the vents and grille before powering it on.

Improperly storing your unit or letting your AC get filthy will result in a call to an AC maintenance service, or having to replace your machine. The old platitude is that “Cleanliness is next to godliness.” We won’t go that far, but you skip a lot of air conditioning maintenance just by keeping your unit clean.

5. Run Your Machine Through the Paces

If you’ve ever seen a basketball team warm up before a game, you’ve seen them do a few different drills to loosen up. They’ll shoot their jumpshots and run layup lines, in addition to stretching and jogging around the court. By activating different muscle groups with different exercises, the players prime their bodies for undergoing many different kinds of stress.

Your air conditioner is the same way. Once you figure out the perfect settings for running your AC, it’s still worth running your unit on different modes and fan speeds for short periods of time. To clarify: if your AC, like the Windmill, has three different modes, run it on all three modes for at least five minutes each month it’s in operation. Engaging different parts of the air conditioner will dislodge and build-up inside the unit and test functionality. Understanding how your unit works will help you understand how to maintain AC units in general.

If you notice any issues with your unit, consult your owner’s manual or reach out to customer support. Continuing to operate the unit despite known issues will cause further problems down the road, and shorten your AC’s lifespan.

The easiest way to handle air conditioning unit maintenance is by building good habits. Get in the habit of checking your filter each month to prevent filter buildup. Get in the habit of cleaning your machine to keep debris away from the internal components. And please, get in the habit of reading the owner's manual. The manual will be specific in telling you how to maintain your AC unit, specifically.

We’ve described ACs oozing mold and pebble ricochet; these are relatively extreme issues with an air conditioner. And yes, following our maintenance tips will prevent your AC from looking like a Goosebumps cover. But more importantly, by building good maintenance habits and taking care of your machine, you’ll ensure that your AC will operate at its peak for years to come.

","2022-07-14T20:00:00Z",[4547],{"_4303":4760,"_462":4761},"eyJsYXN0X2lkIjo1NTkzMDk3ODMyMDIsImxhc3RfdmFsdWUiOjE2NTcxOTcwMDAwMDAsIm9mZnNldCI6MzJ9",{"_88":4762,"_32":4763,"_413":4764,"_4283":4765,"_61":4766,"_147":4771,"_4291":4772,"_4293":4773,"_450":4774},"Problems With Peaker Plants","gid://shopify/Article/559309783202","problems-with-peaker-plants","Peaker plants are a problem. These are power plants that only run when electricity demand is high. In addition to being more expensive to operate than other power plants, peaker plants are far wors...",{"_32":4767,"_73":4768,"_62":-5,"_75":4769,"_71":4770},"gid://shopify/ArticleImage/111144304802","https://cdn.shopify.com/s/files/1/0418/1796/4706/articles/360_F_294827267_oXLYDaRkixTSsu78zS8yfnIDBqaQGpgu_56770912-1fbd-4ce4-b119-6bbbb45d2812.jpg?v=1739575348",540,360,{"_88":4274,"_413":4273},"

Peaker plants are a problem. These are power plants that only run when electricity demand is high. In addition to being more expensive to operate than other power plants, peaker plants are far worse for the environment. To further compound the environmental issues, peaker plants are disproportionately located in or near lower-income communities. In the State of New York, a third of peaker plants are located in environmental justice communities*, contributing to pollution-related health crises and compounding underinvestment in community health.

Three-quarters of a million New Yorkers live within one mile of a peaker plant, where the air quality is at its worst. The highest concentration of peaker plants is along the East River, where 78% of the affected population is part of a low-income group or a community of color. Peaker plants emit twice as much carbon dioxide, and twenty times the amount of nitrogen oxide. Many run on fuel-oil or kerosene, both highly polluting. In the Mott Haven and Melrose neighborhoods of the Bronx, which are surrounded by peaker plants, the rate of emergency room visits for children with asthma is triple the citywide rate. In addition to respiratory issues, peaker plant pollution is a risk factor for heart disease and cancer.

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Then there’s the economic burden peaker plants carry. Because the plants are older—47 years old on average, which is well past normal retirement age—they are less efficient, and therefore more expensive to operate. At their worst, peaker plants are 1,300% more expensive than the average cost of electricity in New York. The EPA projects that the number of 90 degree days in NYC will triple in the next 30 years, which means higher energy demands and more peaker plants in use.

At Windmill, we care deeply about environmental justice and sustainability. We’ve launched a first-of-its-kind demand response program to help mitigate peaker plant dependency. You can learn more about our demand response initiative here, and about our environmental commitment here. If all ACs in New York City were part of this automated power reduction program, we could retire more than half (12) of the city’s peaker plants and save more than $100 million per year.

The good news is that there are long term solutions to the peaker plant problem. New York State established targets for energy storage—1500 MW (megawatts) by 2025 and 3000 MW by 2030—which would create power reserves, serving as an alternative to peaker plants. In addition, the State set out plans to decommission peaker plants with the highest nitrogen oxide emissions between 2023 and 2025.

Peaker plants hurt people and the environment. We can limit our dependency on dangerous energy sources by participating in demand response programs. Even if the impact of one person is small, collectively our actions make a huge difference. Consider joining up with local environmental justice organizations and advocating for cleaner, sustainable energy for everyone. To find an environmental organization or cause to support near you, check out the following lists:

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Global Stewards
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One Percent for the Planet
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Climate Justice Alliance
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Charity Navigator
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For New Yorkers, check out the NY Environmental Justice Alliance to stay up to date on local environmental campaigns.

*The California Environmental Justice Alliance defines an environmental justice community as “neighborhoods surrounded by freeways and industrial facilities, small towns without clean drinking water or sidewalks and excluded from public investments.”

","2022-07-07T12:30:00Z",[4775],"News",{"_4303":4777,"_462":4778},"eyJsYXN0X2lkIjo1NTkzMTQzMDUxODYsImxhc3RfdmFsdWUiOjE2NTY1OTIyMDAwMDAsIm9mZnNldCI6MzN9",{"_88":4779,"_32":4780,"_413":4781,"_4283":4782,"_61":4783,"_147":4786,"_4291":4787,"_4293":4788,"_450":4789},"Stay Cool: Your Guide to Finding the Best AC Units","gid://shopify/Article/559314305186","stay-cool-your-guide-to-finding-the-best-ac-units","Whether you’re moving apartments, renovating your dream house, or just looking to upgrade an old machine, you always want to find the best AC units for your situation.",{"_32":4784,"_73":4785,"_62":-5,"_75":4558,"_71":4559},"gid://shopify/ArticleImage/111464349858","https://cdn.shopify.com/s/files/1/0418/1796/4706/articles/ast-windmill-6-blog_239a80d6-cf1b-49bc-a006-16871ce4351d.jpg?v=1741676073",{"_88":4274,"_413":4273},"

Whether you’re moving apartments, renovating your dream house, or just looking to upgrade an old machine, you always want to find the best AC units for your situation. Just like you wouldn’t use a pizza oven to reheat a bowl of soup, different air conditioners are designed for different requirements. The best AC for the garage will not be the best AC for bedroom dehumidification. Choosing the wrong machine means choosing to pay more money for a worse climate. You can find the best personal air conditioners for your home by considering three factors: what room you’re cooling, what you use the room for, and how much you’re willing to pay.

Square Footage: BTUs and You

First, let’s talk floorplans. How large of a space are you looking to cool? The best AC for a house isn’t going to be the best AC for a studio apartment. In addition to understanding the size of each room in your home, think about whether you keep doors in your home open or closed. Open doors increase the square footage your air conditioner needs to cover, but improve the overall airflow in your home.

Once you’ve figured out the rough area to be cooled, it’s time to learn about British Thermal Units, or BTUs. Like other British units of measurement, BTUs have been replaced in modern science by the Joule (one Joule is about 1055 BTUs). Unfortunately for science teachers everywhere, air conditioning and other appliances are usually rated in BTUs.

Here’s a handy chart that tells you how many BTUs you need based on the square footage you’re dealing with. Notice that ranges of square footage require the same number of BTUs. Keep that in mind when thinking about the open and closed doors in your home.

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How and Where You’ll Use Your AC

Now that we’ve figured out square footage, let’s move on to how you’ll be using your AC. How many people are in the room you’re cooling, and do they move around often? The more activity in a room, the warmer it will be, which means the best personal air conditioners aren’t as good for groups. Consider if there is something like a fireplace or an oven in the room, with additional ventilation to outside. Opening those vents create additional ways for air to move around, so more warm air will creep in. The right AC for your kitchen might not be the best AC for bedroom dehumidification.

When trying to find the best AC units for your home, geography also matters. As you move closer to the equator, cooling an area requires more energy. That’s because areas closer to the equator receive much more sunlight. Geography should also be a factor when you’re thinking about how often you’ll be operating the unit. In temperate climates, you might only run an AC a few times a week, but in humid places your AC could be running constantly. In a humid enough environment, it might be worth investing in a separate dehumidifying unit so you don’t need to operate your AC constantly. In particularly warm climates, using multiple, smaller units to cool individual rooms can be more cost-effective than using a single large unit to cool your entire home.

The last element of location is installation. South-facing windows let in more sunlight, which means an AC unit in a south-facing window is less efficient. Regardless of which direction the window faces, any window that receives a lot of sun is a bad fit for an air conditioner. In some cases, people install awnings just to keep the sun off their AC. If your unit is installed in the corner of a room, make sure the vents are oriented correctly to distribute the air. You don’t want your AC blowing cool air directly into the wall!

The Costs, Personal and Environmental

No one likes wasting money. Everything we’ve gone over so far will help you find the best AC units for different situations, and optimizing that decision will save you money. Another financial factor to consider is age. Older machines run less efficiently, costing more to cool less. If a machine is old enough, there’s a chance the refrigerant is an outdated compound, like Freon. Modern refrigerants, like R32, are less harmful to humans and the environment. With comparable costs, you should bias towards newer machines.

Some newer machines are connected to the internet and can be controlled remotely. With the Windmill, for example, the phone app lets you schedule your AC to turn on and off to match your day. Taking advantage of these features will save you money, as you won’t be wasting cool air on an empty home. In some ways, you could say the best personal air conditioners are the ones used efficiently.

Can the best personal air conditioners also be the best AC units for planet Earth? While we all want to stay cool, there’s no point in having air conditioning without any air to condition. When purchasing an AC unit, see if you can find information on the operational efficiency. Environmental Certifications like EnergyStar are a good way to find eco-friendly units. In addition, some companies, like Windmill, participate in carbon buyback programs or find other ways to provide ecological restitution.

The reality of the situation is that there is no way to operate an air conditioner without consuming energy and contributing to climate change. A study by the International Energy Agency from 2018 predicted that air conditioning will be one of the largest drivers of energy consumption over the next thirty years. By 2050, the IEA predicts the power demand from ACs will triple. However, the same report demonstrates how more efficient air conditioners could cut that energy use in half while lowering harmful emissions. Going forward, the best AC units will be eco-forward and responsibly manufactured.

","2022-06-30T12:30:00Z",[4578],{"_4303":4791,"_462":4792},"eyJsYXN0X2lkIjo1NTkxMDk1Mzc5NTQsImxhc3RfdmFsdWUiOjE2NTQ1MTg2MDAwMDAsIm9mZnNldCI6MzR9",{"_88":4793,"_32":4794,"_413":4795,"_4283":608,"_61":4796,"_147":4799,"_4291":4800,"_4293":4801,"_450":4802},"Eco Rewards™ and You","gid://shopify/Article/559109537954","eco-rewards-and-you",{"_32":4797,"_73":4798,"_62":-5,"_75":4558,"_71":4559},"gid://shopify/ArticleImage/111144206498","https://cdn.shopify.com/s/files/1/0418/1796/4706/articles/Bedroom_1320_610_ad13d5de-503e-4c03-96b9-c265650c4a8d.jpg?v=1739575208",{"_88":4274,"_413":4273},"

Here at Windmill, we’re taking a multifaceted approach towards environmental sustainability. That’s why we use the least harmful refrigerant available, why we participate in a carbon offset program, and why we’re launching a recycling program for old AC units. We know Windmill owners are also passionate about environmental sustainability, which is why we’re delighted to announce our first-of-its-kind program for our qualifying New York customers, Eco Rewards™.

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Eco Rewards™ is a demand response program, so let’s break down what that means. During times of peak energy demand, like heat waves, power grids are forced to call upon more expensive and dirtier sources of power. By decreasing your energy usage during those demand surges, you help keep those polluting plants offline.

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Eco Rewards™ works by tweaking the thermostat on your Windmill AC and increasing the temperature by just a few degrees. You get an alert before each Eco Rewards™ Event, so you know that you’re helping keep those polluter plants offline. In addition to helping the environment, you get paid for participating in Eco Rewards™ Events! So you can make money while you make a difference with the environment.

We anticipate there will be on average four Eco Rewards™ Events each summer, and they won’t last longer than four hours. Of course, you can always choose to opt out of an Eco Rewards™ Event. But remember, by participating in more events, you’re doing more for the planet.

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At Windmill, our mission has always been to keep you cool while preserving the environment. With Eco Rewards™, we’re taking another step towards making a sustainable lifestyle accessible. If you have any questions about the program, check out the linked blogs for a more comprehensive breakdown. And as always, don’t hesitate to reach out with any questions. Together, we can keep ourselves—and our planet—cool for years to come.

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For those of us with allergies, early summer is peak pollen season. It’s also the time of year when people run their ACs the most, and the last thing you want is to be hacking up a storm while you’re overheated. However, you might notice that your allergies get worse inside your home, especially when you’re running your AC. You don’t want to trade one kind of discomfort for another, so let’s break down how allergies and air conditioning interact, how to optimize your air conditioner for allergies, and which supplemental products help make your home allergen-free. It’s not too hard to turn your window unit into the best air conditioner for allergy sufferers.

You might be wondering—if I’m inside and the windows are closed, why are there allergens in my home? Unfortunately, allergens enter your home on your clothing, your shoes, your pets, and even through the air vents. Poor insulation, especially in older homes, allows allergens to seep in through windows and even sometimes through the walls. In an enclosed space, the allergens have nowhere to go, which can make your allergies even worse. If you’re running a window air conditioner, you might think the AC is pulling in allergens from outside, but that’s actually a common misconception. A window AC unit intakes inside air, through the front of the unit, before cooling the air and releasing the heat exhaust via its outside-facing vents.

In fact, the best air conditioner for allergy sufferers might already be in your home. Many common allergen producers travel through the air, like dust mites and pet dander. Other allergen producers, like fungal spores, show up more often in humid weather. Air conditioners naturally dehumidify the air in your home while cooling things down, which reduces the risk of mold and removes fungal spores from circulation. The water that drips out the back of an AC is actually the humidity from within your home.

Your unit’s filter also helps out with air purification. Standard mesh filters prevent larger allergens, like pet dander, from recirculating in your home. In addition to our easy-to-clean mesh filter, we designed supplemental Activated Carbon Filters for the Windmill AC to trap even more volatile organic compounds and allergen microparticles. Activated Carbon (which is a fancy name for a special kind of charcoal) traps gasses that pass through most filters, which has the nice additional benefit of improving how your home smells.

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But the relationship between allergies and air conditioning isn’t always sunshine and low humidity. If you don’t take care of your unit, it will become a bad air conditioner for allergies very quickly. If you allow water to build up in a window unit, mold is going to form within the AC. Then, when you run the machine, allergens will spread throughout your home. As filters wear down over time, they are less effective at removing allergens as well. In fact, expired carbon filters will actually release the pollutants they previously filtered out! Despite not taking in outside air, improperly installing your window AC will leave gaps for outside allergens to enter your home. Those same leaks in your home will let out the filtered air, raising the air pollution level even higher.

There’s a silver lining: using your window unit air conditioner for allergies just means using your machine responsibly. In some ways, the routines for taking care of your allergies and air conditioning are similar. With a unit like the Windmill AC, installing the unit at 1° pitch (~¼ inch) backwards takes care of water buildup, preventing mold from forming. If you ever do notice standing water in your unit, power it off and empty the water before using a non-toxic household cleaner to disinfect your AC.

Your unit should have a change filter light to let you know when your filter gets too grody. Even if the light doesn’t come on, it’s a good idea to check your filter after a month of regular use (or more often, if you’re ambitious!). The Windmill AC has a washable and reusable filter, but some other window units may require changing out the filter each time.

If you’re going to use an additional filter, remember to regularly change that out as well. Our Activated Carbon Filter subscription sends you a four-pack each year, so you can change out the carbon filter after about two or three months of regular use. Having these good habits will make both your allergies and air conditioning run more efficiently, saving you money and keeping you cooler and healthier at the same time. The best air conditioner for allergy sufferers is a properly installed and well-maintained machine.

\nBy taking good care of your window AC, your unit will dehumidify and filter allergens out of the air. But remember, if your AC isn’t filtering allergens out, your AC could be circulating allergens around your home. If you’re ever concerned that your AC isn’t working, or if it’s making the allergy situation worse, reach out to us at Windmill so we can give you a hand. Just because it’s allergy season outdoors doesn’t mean it has to be allergy season inside your home.

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If you were wondering how to reduce indoor air pollution in your home, there are a bunch of simple changes that will make a huge difference. As you read our suggestions, you might notice that some of the ways to reduce indoor air pollution are already part of your daily routine. Don’t worry if you can’t make all of these changes right away; any one of them will have a positive impact on the air you breathe.

1. Keep windows and doors open

The easiest ways to reduce indoor air pollution all have to do with proper ventilation. When possible, keep your windows and doors open to allow proper airflow throughout your home. During pollen season, you might want to keep your windows closed, and in the winter, closing off rooms will help maintain heat. We’re not saying you have to suffer through the elements! But on nice evenings, or when no one is home, maintaining open air flow diffuses any pollution over a wider area, improving the overall air quality in your home.

2. Take care of pet hygiene

As much as you might love your fur babies, your lungs don’t love their dander. Make sure you bathe pets regularly to reduce the amount of air pollution they produce. When you’re looking to find a new fuzzy friend, consider a hypoallergenic pet. One of the easiest ways to reduce indoor air pollution is to avoid pollutants in the first place!

3. Reduce indoor smoke

Who doesn’t love when their kitchen aromatizes their home? However, burning oils and grease from cooking linger long after their odor, lowering the air quality in your home. And though we love a good fire in the winter, fireplaces tend to clog up and produce a ton of air pollution. Likewise, smoking tobacco or marijuana indoors produces a lot of pollutants. Using your cooking vents and limiting indoor smoke are two simple ways to reduce indoor air pollution.

4. Use your window air conditioner!

Do air conditioners improve air quality? Absolutely. How do air conditioners improve air quality? First, they dehumidify air. A lot of pollutants like hanging out in moisture, and window ACs extract that moisture in order to produce cool air. Second, your AC unit does a great job of circulating air around your home, which helps diffuse pollution and improve air quality. On cooler days, running your AC on fan mode circulates the air in your home without needlessly running the compressor.

5. Change filters regularly

If you use an air conditioner in your home, make sure you check and change the filters regularly. A clogged filter reduces the efficiency of your AC, which will cost you more money in the long run. And while filters are good ways to reduce indoor air pollution, an expired filter can actually contribute pollutants to your home. For more information on air conditioning filters, check out our article on the subject here.

6. Take your shoes off

Let’s say you’re really lazy, and you’re looking for how to reduce indoor air pollution with the least effort possible. Take your shoes off! Your shoes carry pollutants in with them, and wearing shoes inside tracks those pollutants all around your home. To take things a step further, take off your jacket or outer layer as soon as you get inside. To the delight of parents everywhere, taking your shoes off and hanging up your jacket are two easy ways to reduce indoor air pollution.

7. Clean your carpet

Vacuuming regularly will pick up pet dander and other pollutants that love to lurk in your carpeting. Same with rugs! While carpeting looks lovely, hardwood and tile don’t hold on to as many allergens, so consider going without carpeting if you suffer from severe allergies.

8. Dust with microfiber

Microfiber is a fancy way of saying a fabric with really skinny threads. For some context, a microfiber is thinner than a strand of silk, or about one-fifth as thick as a human hair. Because microfibers are so small, the spaces between them are even smaller, and that’s why microfiber cleaning cloths work better. While any old rag will take care of the dust you can see, microfiber wipes up pollutants like fungal spores and pet dander.

9. Avoid covering odors

This piece of advice might sound counterintuitive. After all, if something is stinking up your home, who wouldn’t want to cover the odor? But remember, these are tips on how to reduce indoor air pollution, not tips on making your home smell like potpourri. While scented candles and emulsified fragrances smell lovely, they actually lower the air quality in your home. Think about the air in your home like a highway, and air pollution like a traffic jam. When you introduce more aromas into your home, you’re adding more cars to the traffic jam. It’s much better to open a window or a vent and let the odors out.

10. Bring in the cavalry

Remember when we answered, “How do air conditioners improve air quality?” You might have wondered why we didn’t just recommend purchasing a dehumidifier or air purifier for your home. For most people, air conditioners do enough to improve the air quality in their home, but in some environments, more help might be needed. And that’s when we recommend bringing in the cavalry.

Dehumidifiers remove moisture from the air in your home, which takes care of the pollutants that live in moisture. Humidity encourages mold to grow, so dehumidifying regularly makes your home a hostile environment to mold and other fungal growths.

Different types of air purifiers work in different ways, so make sure to do your research before selecting an appliance for your home. An air purifier will not take care of air pollution by itself, so make sure you’re following the rest of these tips as well!

Now you know the basics of how to reduce indoor air pollution. Remember, good hygiene and responsible home ownership will do a lot of the work for you. While we went over ten tips, you might not need to use all of them to improve the air quality in your home. Good luck, and easy breathing!

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If you’ve ever wondered why there’s a filter in your window unit air conditioner, or why your change filter light keeps randomly coming on, or whether or not you need another filter on top of your first one, this is the article for you. We’ll break down the basics of filtration and how activated carbon filters work. You’ll be able to answer questions like, \"Are carbon air filters safe?\" and \"Do I need an activated carbon air filter for home air purification?\"

Let’s start with the basics of filters. If you’ve worn a mask lately, you understand the principle of filtration. A filter, in its broadest sense, is an impediment to the flow. The Britta in your fridge filters the flow of water, your shower grate works to filter hair out of the drain, and in a larger sense, the walls of your home filter the weather out of your bedroom.

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But not all filters operate identically. In the Windmill AC, we’ve included a washable anti-microbial mesh filter. This filter stands between the intake and evaporator in your window unit, catching dust and other junk you don’t want recirculating in your home. When your change filter light comes on, that means the AC senses a buildup of crud on the filter. In some units, that means you need to toss your filter for a new one, but the Windmill’s mesh filter is reusable and easy to clean. If you ignore the change filter light and let grime build up, eventually, a standard air filter stops letting the air through. We’ll talk more about that a bit later on.

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Activated carbon filters work a little differently than standard filters, through a process called Adsorption. That’s not a typo—adsorption and absorption are related, but distinct processes. When a sponge absorbs water, the water molecules mix in with the sponge. Once the sponge has reached its absorptive capacity, it can’t take on any more water. Adsorption occurs when a gas, liquid or dissolved solid adheres to a surface. Activated carbon is a great adsorbent for filtering organic substances, so it’s the ideal backup for the mesh filter in your AC. Mesh filters won’t catch odor-carrying gasses, mildews, or other volatile organic compounds, but an activated carbon filter will snare them via the magic of adsorption.

How important is it to stop these volatile organic compounds? The EPA notes that VOCs may “have short- and long-term adverse health effects.” The EPA’s Total Exposure Assessment Methodology (TEAM) studies found “levels of about a dozen common organic pollutants to be 2 to 5 times higher inside homes than outside…. Additional TEAM studies indicate that while people are using products containing organic chemicals, they can expose themselves and others to very high pollutant levels, and elevated concentrations can persist in the air long after the activity is completed.” Getting an activated carbon air filter for home use can make a huge difference.

A common misconception is that activated carbon filters are HEPA filters. HEPA filters (which stands for High Efficiency Particulate Air filters) remove at least 99.97% percent of any airborne particles that are smaller than .3 microns. A HEPA filter has a MERV (Minimum Efficiency Reporting Value) rating of 17. On the other hand, an activated carbon filter’s MERV rating is closer to an 8. That’s a lot of technical jargon to state that, no, activated carbon filters are usually not HEPA filters. With MERV scores, the higher the number, the more restrictive the filter. We’ll come back to that in a minute, but for the time being, remember that activated carbon filters are not HEPA filters.

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Now, to the next question: are carbon air filters safe for your machine? The short answer is yes. The longer answer is yes, but they stop working eventually. Remember how you have to clean your mesh filter to stop it from gunking up? Adsorptive materials work similarly. Eventually, your activated carbon filter’s adsorptive surfaces will be fully covered, and just like a sponge at its absorptive limit, the filter will stop working. Once the filter can’t adsorb any more, additional substances can dislodge crud from the adsorptive layer. Basically, once an activated carbon filter burns out, it actually starts contributing bad odors and pollutants into your home!

Again, that’s not an issue if you swap in a carbon air filter replacement when your filter expires. So how long is the average activated carbon air filter lifespan? A good rule of thumb is to change out your filter at most every three months.

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Depending on how heavily you use your unit, you may experience a shorter average activated carbon air filter lifespan. You should also consider the temperature and humidity in your area when using an activated carbon filter. If either temperature or humidity reaches a high enough point, the carbon in the filter will begin to desorb sooner. Fortunately, your window unit produces cool, low-humidity air, which is the ideal working condition for an activated carbon filter.

If you notice your average activated carbon air filter lifespan is under a month, there’s a few different common issues. One, like we just discussed, is the weather. At peak humidity season, filters will wear out faster. If an activated carbon filter gets wet or is exposed to extreme heat, the carbon will be altered and the filter will have a shorter lifespan. In fact, activated carbon is flammable—you might be familiar with a type of activated carbon we call charcoal. But there’s no need to worry; as long as you don’t store your filters in a fireplace, there’s no ignition risk.

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So now we can answer, “Are carbon air filters safe for my home?,” with a resounding yes. Make sure you store your activated carbon filters in a cool, dry place. If there’s ever a bad smell coming out of your window unit air conditioner, power it down and check the activated carbon filter. Most likely, that’s the culprit.

However, a bum filter can cause issues in more ways than one. Remember earlier when we discussed HEPA filters? We mentioned that, with MERV scores, the higher the number, the more restrictive the filter. That’s great if you’re putting the filter in a machine that can handle it, but what happens when you put an overly-restrictive filter in your window AC unit?

Well, every part of the machine operates at a lower efficiency. With a clogged filter, your unit’s fan has to work harder to pull in enough air. Cool air and humidity sometimes get trapped behind clogged filters, causing moisture to accumulate inside your unit, and sometimes even freezing the inner workings. Remember, moisture and carbon don’t mix well, so you’ll need a carbon air filter replacement if you notice ice on your machine.

Of course, gunky filters aren’t the only cause of frozen ACs. Before you install your air conditioner, make sure there are no curtains or furniture blocking any of the vents. It’s possible that your unit froze due to a low coolant level. If you encounter a frozen AC, power it down and check the filter. If your filter looks okay after a clean, reach out to a professional. While we believe in your DIY skills, coolant and other toxic chemicals are best left to the pros.

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If you’re a Windmill customer, check out our subscription-based, activated carbon air filter replacement program. We’ll mail you four filters each year, so you’ll always have the replacement ready. Our carbon filters are built specifically for Windmill machines and fit easily into our washable mesh filters. For other brands, check with your manufacturer to see if you can use supplemental filters, and where to install them to preserve airflow through your air conditioner. You want to filter out VOCs and other pollutants, but not block off the air through your machine.

Alright, so back to our original questions: “Are carbon air filters safe?” Yes! As long as you make sure to change them regularly and store them properly, activated carbon air filters are safe for your home. “Do I need an activated carbon air filter for home air purification?” You don’t, but it’s a good idea to grab one. Activated carbon doesn’t trap particles like a HEPA filter would; instead, the carbon lures in adsorbents and coats itself in all the junk you don’t want to breathe. Because they work via adsorption, activated carbon filters deodorize your air as they clean it. If you’re looking for low-cost and environmentally-friendly air purification, consider an activated carbon air filter for home use.

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