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The Windmill AC

Free carbon filter included

The Windmill AC

Regular price $299
$299 Regular price $339 Sale price

A modern window air conditioner designed with you in mind. The Windmill AC is easy-to-install, efficient, quiet, eco-friendly, and ... cool.

● Easy-to-install
● Efficient
● Quiet
● Eco-friendly
● App and voice control
● Remote control
● Simple on-unit buttons
● 3 cooling settings
● 3 fan speeds
● Auto-dimming LED Display
● Double-insulating side panels

Will This Work With My Window?

Pick Your Windmill AC

Pick Your Windmill AC

Comes with standard white panel. Other options ship separately.
Choose panel option
Color: Medium (8000 BTU)
$0
$49
$49
$49
$49
Comes with standard white panel. Other options ship separately.
Choose panel option
Color: Medium (8000 BTU)
$0
$49
$49
$49
$49
Comes with standard white panel. Other options ship separately.
Choose panel option
Color: Medium (8000 BTU)
$0
$49
$49
$49
$49
Comes with standard white panel. Other options ship separately.
Choose panel option
Color: Medium (8000 BTU)
$0
$49
$49
$49
$49

Customize Your Windmill AC

Pack

Windmill Activated Carbon Filters

Indoor air quality is 2-5x worse than outdoors...
Read more
Indoor air quality is 2-5x worse than outdoors. Activated carbon is found in many air purifiers and helps protect against fumes, odors, smoke, volatile organic compounds for 2-3 months.
Show less

One FREE Filter Included (Lasts 2 - 3 months)

Filter Auto-Refills. Choose Based on Usage (Optional):

More Details

Shipping Information

6mo pack (2 filters)

Order Date Pre-Jul 1 Post-Jul 1
Year 1 2mo after purchase No delivery this year
Years 2, 3, etc. Annually on Apr 1st

9mo pack (3 filters)

Order Date Pre-Jun 15 Post-Jun 15
Year 1 2mo after purchase No delivery this year
Years 2, 3, etc. Annually on Mar 1st

12mo pack (4 filters) ships annually 2mo after purchase.

Cancel or defer shipment anytime. Billing occurs upon shipment of each filter pack and includes cost for all weeks within the applicable monthly period.

View full details

Product Details

Details for 8000 BTU
● Room size: Up to 350 sq ft
● Dimensions: 13.2 H x 19.3 W x 19.4 L
● Window type: Double- or single-hung only (no through-the-wall use)
● Window opening width: 23-37 inches
● Window opening height (minimum): 14 inches
● Power cord: 115V, 6.5 feet (bottom right of unit)
● Power consumption: 690W
Details for 6000 BTU
● Room size: Up to 250 sq ft
● Dimensions: 12 H x 18 W x 15.6 L
● Window type: Double- or single-hung only (no through-the-wall use)
● Window opening width: 22-36 inches
● Window opening height (minimum): 13 inches
● Power cord: 115V, 6.5 feet (bottom right of unit)
● Power consumption: 540W
Details for 8,000 BTU AC with WhisperTech™
● Room size: Up to 350 sq ft
● Dimensions: 13.3 H x 19.3 W x 22.5 L
● Window type: Double- or single-hung only (no through-the-wall use)
● Window opening width: 23-37 inches
● Window opening height (minimum): 14 inches
● Power cord: 115V, 6.5 feet (bottom left of unit)
● Power consumption: 740W
Details for 10,000 BTU AC with WhisperTech™
● Room size: Up to 450 sq ft
● Dimensions: 13.3 H x 19.3 W x 22.5 L
● Window type: Double- or single-hung only (no through-the-wall use)
● Window opening width: 23-37 inches
● Window opening height (minimum): 14 inches
● Power cord: 115V, 6.5 feet (bottom left of unit)
● Power consumption: 960W

FAQs

● Our 8,000 BTU unit efficiently and quietly cools spaces up to 350 sq ft.
● With our double-insulating side panels, many customers choose to leave their ACs in all year.
● You can wash/change your filters with an easily removable magnetic front panel (for cleaner air!).

See all FAQs
● Our 6,000 BTU unit efficiently and quietly cools spaces up to 250 sq ft.
● With our double-insulating side panels, many customers choose to leave their ACs in all year.
● You can wash/change your filters with an easily removable magnetic front panel (for cleaner air!).

See all FAQs
● Our 8,000 BTU AC with WhisperTech™ quietly cools spaces up to 350 sq ft. (starting at 42 dBs)
● WhisperTech™ ACs are 9X quieter and 35% more efficient than legacy non-inverter ACs.
● All Windmill ACs can be controlled by the buttons, remote, app, and voice (Alexa/Google)
● With double-insulated side panels, many customers choose to leave their AC in year round.

See all FAQs
● Our 10,000 BTU AC with WhisperTech™ quietly cools spaces up to 450 sq ft. (starting at 42 dBs)
● WhisperTech™ ACs are 9X quieter and 35% more efficient than legacy non-inverter ACs.
● All Windmill ACs can be controlled by the buttons, remote, app, and voice (Alexa/Google)
● With double-insulated side panels, many customers choose to leave their ACs in year round.

See all FAQs

Hi! Are you sure you want to remove filters?

Indoor air quality is 2-5x worse than outdoors. Activated carbon is found in many air purifiers and helps protect against fumes, odors, smoke, volatile organic compounds for 2-3 months.
Okay, Close

What’s included

The Windmill AC & Install Kit

The install kit is pre-assembled for an easy installation.

Filters

Antimicrobial-protected mesh (washable) and activated carbon (lasts ~3mo).

Cosmetic Side Panels

Keeps things insulated, efficient, and clean-looking.

Remote Control

Sleek and intuitive, so you don't have to leave the couch.

Also ships with two types of insulation foam, scissors, window lock, and other installation hardware and accessories. 

Easy-to-install

The installation kit is already pre-assembled in the box!

Efficient

Air blows up and out into your room at the perfect angle for better cooling.

Quiet

The Windmill AC runs smoothly and gently in the background.

Eco-friendly

We help offset the carbon footprint of every Windmill AC purchased.

Smart

You can control your AC from anywhere with our app (Apple and Android).

Installation is a breeze

The install kit comes pre-assembled, so the window AC is ready to go out of the box. Just follow our easy-to-read instructions and chat us if you have issues - you’ll be feeling cool in no time.

Elegant, yet powerful

We designed the AC to keep you comfortable, without getting in the way. Top vents blow air up and out at the perfect angle, delivering better airflow, quietly. With curved edges, clean lines, and an auto-dimming LED display, it hides in plain sight.

Smart and connected

Control your smart window air conditioner with our app, for iPhone and Android. Turn the window AC unit on 10 minutes before you get home on a blazing hot day. Turn it off if you forgot you left it on (now that’s eco-friendly!). You can also connect your Windmill in-window AC unit to Google Assistant and Amazon Alexa for voice control.

Perfect for most rooms

The Windmill AC fits single- or double-hung windows with an opening width of 23-37 inches (8,300 BTU AC) / 22-36 inches (6,000 BTU AC) and a vertical opening of at least 14 inches (8,300 BTU AC) / 13 inches (6,000 BTU AC). The 6,000 BTU air conditioner easily cools rooms up to 250 square feet, while the 8,300 BTU room air conditioner cools rooms up to 350 square feet.

Earn $$$, save the planet

We love a good win-win… like earning cash and helping the environment with Eco Rewards™, a first-of-its-kind energy management program for window ACs. Enroll your Windmill AC in a few minutes from the app, and we’ll automatically help you use less electricity when it matters most, like during a heatwave. Available in parts of New York and California. Rewards only available in New York, for now.

Eco-friendly to the core

We didn’t want to create another window air conditioner that’s bad for the environment. We use a responsible, eco-friendly refrigerant (R32) with 68% less global warming potential than what’s commonly used (R410a). In addition to recycling old units, we also help offset the carbon emissions of every Windmill AC unit purchased.

Try it out risk-free

If for whatever reason you decide the Windmill AC's not right for you, feel free to return it within 30 days - no questions asked.

Compare our top-rated ACs

All ACs come with a carbon filter Free
Small AC
6,000 BTU

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(Up to 250 sq ft)
Medium AC
8,000 BTU

8K BTU
(Up to 350 sq ft)
Medium AC with WhisperTech™ 8,0008K BTU (Up to 350 sq ft)
Large AC with WhisperTech™ 10,00010K BTU (Up to 450 sq ft)
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Most Popular

Small AC 6,000 BTU (Up to 250 sq ft)

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Medium AC 8,000 BTU (Up to 350 sq ft)

$389
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Medium AC with WhisperTech™ 8,000 BTU (Up to 350 sq ft)

$399
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Large AC with WhisperTech™ 10,000 BTU (Up to 450 sq ft)

$549

Room & Window Requirements:

Up to 250 sq ft Room Size
Up to 350 sq ft Room Size
Up to 350 sq ft Room Size
Up to 450 sq ft Room Size

Noise & Technology:

50 Decibel Rating

What is a Decibel (dB): it's a unit used to measure the intensity of a sound by comparing it with a given level on a logarithmic scale.

Hint: Logarithmic scales are non-linear. This means that a one-digit difference in dB has a bigger difference in intensity than the numbers suggest. For example, 50 dB is 12% more intense than 49 dB on the scale though the number 50 is only 2% bigger than 49.

“2x quieter vs. leading competitor window AC”.

Fixed Speed with Dampener
Compressor Type
Rotary Fan Type
50 Decibel Rating

What is a Decibel (dB): it's a unit used to measure the intensity of a sound by comparing it with a given level on a logarithmic scale.

Hint: Logarithmic scales are non-linear. This means that a one-digit difference in dB has a bigger difference in intensity than the numbers suggest. For example, 50 dB is 12% more intense than 49 dB on the scale though the number 50 is only 2% bigger than 49.

“2x quieter vs. leading competitor window AC”.

Fixed Speed with Dampener
Compressor Type
Rotary Fan Type
42 Decibel Rating

What is a Decibel (dB): it's a unit used to measure the intensity of a sound by comparing it with a given level on a logarithmic scale.

Hint: Logarithmic scales are non-linear. This means that a one-digit difference in dB has a bigger difference in intensity than the numbers suggest. For example, 50 dB is 12% more intense than 49 dB on the scale though the number 50 is only 2% bigger than 49.

“9x quieter is vs. non-inverter traditional or legacy window ACs”.

Variable Speed with Inverter Tech
Compressor Type
Linear Fan Type
42 Decibel Rating

What is a Decibel (dB): it's a unit used to measure the intensity of a sound by comparing it with a given level on a logarithmic scale.

Hint: Logarithmic scales are non-linear. This means that a one-digit difference in dB has a bigger difference in intensity than the numbers suggest. For example, 50 dB is 12% more intense than 49 dB on the scale though the number 50 is only 2% bigger than 49.

“9x quieter is vs. non-inverter traditional or legacy window ACs”.

Variable Speed with Inverter Tech
Compressor Type
Linear Fan Type

Environmental impact:

  • Windmill Eco Rewards™
  • Eco-friendly Refrigerant
  • Carbon Offset
  • Recycling Program
  • Windmill Eco Rewards™
  • Eco-friendly Refrigerant
  • Carbon Offset
  • Recycling Program
  • Windmill Eco Rewards™
  • Eco-friendly Refrigerant
  • Carbon Offset
  • Recycling Program
  • 35% more energy efficient vs. minimum efficiency standard
  • Windmill Eco Rewards™
  • Eco-friendly Refrigerant
  • Carbon Offset
  • Recycling Program
  • 35% more energy efficient vs. minimum efficiency standard

Key Features:

  • Pre-Assembled Install Kit
  • App, Voice, Remote & Button
  • 2x Energy Star Insulation
  • Dual Filtration Air Inflow
  • 45° Air Outflow
  • Auto-dimming LED Display
  • Pre-Assembled Install Kit
  • App, Voice, Remote & Button
  • 2x Energy Star Insulation
  • Dual Filtration Air Inflow
  • 45° Air Outflow
  • Auto-dimming LED Display
  • Pre-Assembled Install Kit
  • App, Voice, Remote & Button
  • 2x Energy Star Insulation
  • Dual Filtration Air Inflow
  • 45° Air Outflow
  • Auto-dimming LED Display
  • Pre-Assembled Install Kit
  • App, Voice, Remote & Button
  • 2x Energy Star Insulation
  • Dual Filtration Air Inflow
  • 45° Air Outflow
  • Auto-dimming LED Display
slide to see other ACs

Don’t sweat the setup

If you need a little help, we’ve made it easy for you.

Do It Yourself

We’ve pre-assembled the installation kit so setup is a breeze. And, we’re always a message away if you run into issues.

TaskRabbit

For an extra helping hand, we’ve partnered with TaskRabbit nationwide so you can find someone qualified to install your AC.

Premium Installation

For those in NYC, we offer custom plexiglass and city-compliant installations by professional technicians.

Why we're better

We combined over 60 years of AC knowledge with a fresh perspective to design a better window air conditioner from scratch. Here's how we stack up.

  Windmill Legacy ACs Other New ACs

Design
Is the AC something you’d actually want to look at in your home?

Installation
Is the install kit pre-assembled? Does the company offer installation services and direct customer support?

Environment
Does the AC run efficiently and use an eco-responsible refrigerant? Does the manufacturer help offset its carbon footprint?

Air Quality
Does the AC come with multiple filter types to help clean and purify your air?

WiFi Control
Can you control the AC with an app or voice commands?

Insulation
Does the AC include double-insulation on the sides to better seal your windows?

Noise
Does the AC perform smoothly and run quietly in the background?

Note: represents generalized view of the window AC market and does not intend to cover all or specific manufacturers, models, or products.

From the ones living breezy

Cleaner air, delivered

Fresh filters mean fresher, healthier air, plus improved performance and longevity for your AC. We’ll keep you supplied so you don’t have to think about it too much.

Shop Accessories

Give your old AC a new life

When refrigerants leak into landfills, it’s pretty awful for the environment. Properly recycling your old AC unit is an easy way to prevent that.

Find a Recycling Facility

A breeze 60 years in the making

We’re built on a longstanding family tradition in the AC manufacturing business, bringing you a new spin on proven quality.

Our Story

Item 1

Windmill Activated Carbon Filters
4-pack

Item 2

The Windmill AC
Small AC 6,000 BTU (up to 250 sq ft)

Item 3

Carbon Offset
Included

Regular price $299