Windmill 5,000 BTU Window Air Conditioner - Cools up to 150 Sq. Ft. - Easy Install, Voice-Enabled, Remote Control & App Control, Energy-Efficient AC Unit for Small Spaces
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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Jul 18 – Jul 31
Style: 5000 BTU Lite
Features
- SMART AC FOR SMALL SPACES: The perfect window unit air conditioner for bedrooms, home offices, and small apartments up to 150 sq ft with efficient 5,000 BTU cooling power and award-winning brand design that complements any room decor.
- SMOOTH AIRFLOW COOLING: Enjoy cooling starting at just 51 dB (think light rainfall) with smooth airflow performance that won't disturb your sleep, work, or relaxation time.
- CONTROL FROM ANYWHERE: Control your 5,000 BTU air conditioner from anywhere using the streamlined Windmill Air app for iOS and Android, plus voice control compatibility with smart home devices for ultimate convenience.
- PREMIUM FEATURES & DESIGN: Features a sleek digital control panel with auto-dimming LEDs, easy-access washable filter, 3 cooling modes (cool, eco, fan), and 3 fan speeds for customized comfort.
- QUICK & EASY INSTALLATION: This window A/C unit includes a complete installation kit for standard single & double-hung windows (min. opening height: 14.5", width: 23-34"). Setup takes minutes so you can start cooling your space without complex instructions.
Brand: Windmill
Capacity: 0.42 Tons
Cooling Power: 5000 British Thermal Units
Product Dimensions: 14.8"D x 17.8"W x 15.1"H
Noise Level: 51 Decibels
Refrigerant: R-32
Model Name: 5000 BTU Lite
Item Weight: 42 Pounds
Controller Type: App Control
Installation Type: Window
Cooling Power: 5000 British Thermal Units
Noise: 51 Decibels
Refrigerant: R-32
Installation Type: Window
Item Dimensions D x W x H: 14.8"D x 17.8"W x 15.1"H
Item Weight: 42 Pounds
Controller Type: App Control
Capacity: 0.42 Tons
Floor Area: 150 Square Feet
Brand Name: Windmill
Model Name: 5000 BTU Lite
Model Number: 05W11
UPC: 199284718616
Manufacturer: Windmill
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Jul 18 – Jul 31
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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- Affirm Financing
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- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Style: 5000 BTU Lite
An absolute dream. I use it in a 10x10 office area where it gets it cool decently fast . The unit is extremely easy to set up and use, same with the app for it. When im on my way home I can turn the unit on and by the time I get home (about 20 to 30 minutes) im in a nice cool room to relax and hangout in. The power draw was the major priority when purchasing this unit it barely pulls anything and still works phenomenally. Id highly recommend this to someone who needs a unit for a small room who doesn't want almost any noise but wants to stay cool.
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Reviewed in the United States on June 5, 2026 by Zack
Style: 5000 BTU Lite
Easy setup. Despite it being pretty heavy, I was still able to install it alone. It fits snugly in my window and has a nice seal. I was able to fit it in my 21" W window, too, which I was pleased about. This is one of the only in-window air conditioners that can fit such a small window. The cooling is fast and strong. Completely cooled down my 120 sq. ft. home office within 10-15 min. It will make working in the summertime far more pleasant.
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Reviewed in the United States on May 29, 2026 by KW
Style: 5000 BTU Lite
Honestly? I'm pretty impressed with even the "lite" 5000 btu unit. It's a touch noisy on low, but it absolutely does the thing and cools well. The sounds it makes are consistent and easy to sleep to (even on eco which stops and starts the unit 100%) Overall, this is a solid unit. The only minor downside is it was a bit weird fitting into my window. I had to position the top back further than I normally do on the outer-most window "lip" to get a proper tilt. The manual mentioned screwing a board to the window for storm windows which seemed... extra.
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Reviewed in the United States on August 13, 2025 by Alex
Style: 5000 BTU Lite
Easy to install, quieter than my last one this size and by far better looking! Connected easily to the app and cools quickly. I have some of the whispertech larger sizes in my bigger rooms and love those too. Love their customer support and company overall - highly recommend
Reviewed in the United States on April 6, 2026 by Andrew K
Style: 5000 BTU Lite
Love my new Windmill AC! It’s super compact & light, looks sleek, and runs very smoothly. And really like that I can control the temp from my phone before I get home. 10/10 recommend
Reviewed in the United States on May 31, 2026 by Al McB
Style: 5000 BTU Lite
I’m only giving it three stars because it claims to be quiet and it’s not. I can’t have it on when I’m on conference calls. It is easy to install, lightweight, and cools the room quickly, but it is still too noisy for my office.
Reviewed in the United States on April 17, 2026 by April A Collum
Style: 5000 BTU Lite
It's not quiet. It's actually very loud. The picture shows no buttons on the front. That's what sold me to buy this product. Because I have 2yr old twin boys that destroy just about everything they touch. Including last year's unit. Guess what there buttons. All kinds of buttons!!!
Reviewed in the United States on March 27, 2026 by Sherrie
Style: 5000 BTU Lite
Easy install, light weight. The app is easy to use and set up. Cools a bedroom quickly. Removing 2 stars for the sound. I don’t mind a loud air conditioner. The sound it makes is inconsistent and scratchy. It sounds like metal is rubbing on metal. It is a an irritating sound. The filter is hard to put back in because there are wires that get in the way. Works well enough to not go through the hassle to return but would not buy again.
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Reviewed in the United States on April 2, 2026 by Ryan S