Best Window Air Conditioner (2026): 4 Quiet, Efficient Picks
Last updated: November 9, 2026
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A window air conditioner is the most affordable way to cool a bedroom, home office or apartment, and newer models are far quieter and more efficient than the rattling boxes many of us grew up with. Inverter compressors ramp up and down instead of cycling on and off, which saves energy and cuts noise. The best window air conditioner is sized for your room, quiet enough to sleep beside, energy efficient and easy to install safely.
We compared the most popular window units on noise, energy efficiency, inverter technology, smart controls, installation and price. Here are our picks for 2026.
Our top picks
| Window AC | Design | Score | Buy link |
|---|---|---|---|
| Midea U-Shaped Inverter Window ACBest overall | U-shaped, inverter | 9 | Check price |
| Windmill ACEasiest to install | Standard box; inverter on WhisperTech | 8.7 | Check price |
| LG Dual Inverter Window ACBest for larger rooms | Standard box, dual inverter | 8.6 | Check price |
| GE Profile ClearViewBest for keeping your view | Saddle design | 8.4 | Check price |
The best window air conditioners, reviewed
Midea U-Shaped Inverter Window AC
- Sizes8,000, 10,000 and 12,000 BTU
- CompressorInverter
- NoiseAs low as 42 dBA, according to Midea
- EfficiencyENERGY STAR certified
- DesignU-shaped; window can still open
- SmartMSmartHome app, Alexa and Google Assistant
Midea's U-shaped design straddles the window sash. The noisy compressor sits outside, and you can still open and close the window with the unit installed.
Combined with an inverter compressor, that makes it one of the quietest window units you can buy, as low as 42 dBA according to Midea. It is ENERGY STAR certified and works with the app, Alexa and Google Assistant.
Installation is a little different from a standard unit, and it does not fit every window. Check the measurements before you buy.
What we like
- Very quiet inverter operation
- Window still opens
- ENERGY STAR certified
- App and voice control
Watch out for
- Unusual installation
- Does not fit all windows
- Pricier than basic units
Best for: Bedrooms and anyone sensitive to noise.
Skip it if: You have casement or sliding windows.
Check price on Amazon Price range: See retailers
Windmill AC
- Sizes6,000 and 8,000 BTU Original; 8,000, 10,000 and 12,000 BTU WhisperTech
- CompressorInverter on WhisperTech models only; Original models are not inverter
- EfficiencyCEER up to 15.0 (8K and 10K WhisperTech)
- NoiseFrom 42 dB on WhisperTech models
- DesignSlim unit with a pre-assembled install kit
- SmartApp, voice, remote and an auto-dimming display
Windmill set out to make window ACs easier to live with. Every unit comes with a pre-assembled install kit, so setup is quick.
There are two lines. The Original models are standard units, while the WhisperTech models use an inverter and start at about 42 dB.
The app adds schedules, and you also get voice and remote control. It costs more than budget brands, and like any standard unit it blocks the whole window.
What we like
- Very easy installation
- Clean, modern design
- Quiet WhisperTech inverter models
- Good app with voice control
Watch out for
- Pricier than budget brands
- Original models are not inverter
- Blocks the whole window
Best for: Renters and first-time installers.
Skip it if: You need the quietest possible unit.
Check price on Amazon Price range: From $269 (sale)
LG Dual Inverter Window AC
- SizesAbout 6,000 to 14,000 BTU in the Dual Inverter line
- CompressorDual inverter
- Largest model14,000 BTU LW1522FVSM, cools up to 700 sq ft
- EfficiencyENERGY STAR certified models
- SmartLG ThinQ app and voice control
LG's Dual Inverter window units come in larger sizes that can cool living rooms and open spaces. The 14,000 BTU LW1522FVSM is rated for rooms up to 700 square feet.
The dual inverter compressor is efficient and relatively quiet, and the LG ThinQ app adds remote control and schedules.
Larger sizes are heavy and need sturdy support, and they cost more than basic units.
What we like
- Large capacities available
- Efficient dual inverter
- App control
- Relatively quiet
Watch out for
- Heavy in large sizes
- Pricier
- Standard design blocks the window
Best for: Living rooms and larger spaces.
Skip it if: You only need to cool a small bedroom.
Check price on Amazon Price range: See retailers
GE Profile ClearView
- Sizes6,100, 8,300, 10,300 and 12,200 BTU
- CompressorInverter on the 10,300 and 12,200 BTU models (PHNT10CC, PHNT12CC)
- EfficiencyENERGY STAR certified models
- DesignSaddle design sits below the sill; window stays usable
- SmartSmartHQ app and voice control
The GE Profile ClearView sits mostly below and outside the window, so you keep your view and natural light. You can still open and close the window with it installed.
The 10,300 and 12,200 BTU models use an inverter, which makes them very quiet. The smaller 6,100 and 8,300 BTU models do not.
It has SmartHQ app control. It is expensive, heavy, and its installation is more involved than a standard unit.
What we like
- Keeps the window view clear
- Window still opens
- Quiet inverter on larger models
- App control
Watch out for
- Expensive
- Inverter only on the two largest sizes
- Heavy, more complex install
Best for: Rooms where light and view matter.
Skip it if: You want an easy, low-cost install.
Check price on Amazon Price range: See retailers
Side-by-side comparison
| Midea U-Shaped Inverter Window AC | Windmill AC | LG Dual Inverter Window AC | GE Profile ClearView | |
|---|---|---|---|---|
| Best for | Best overall | Easiest to install | Best for larger rooms | Best for keeping your view |
| Inverter | Yes | WhisperTech models | Yes | 10,300 and 12,200 BTU |
| Window still opens | Yes | No | No | Yes, view mostly clear |
| App control | Yes | Yes | Yes (ThinQ) | Yes (SmartHQ) |
| ENERGY STAR | Yes | Check model | Certified models | Certified models |
| Price | See retailers | From $269 (sale) | See retailers | See retailers |
| Our score | 9 | 8.7 | 8.6 | 8.4 |
How to choose a window air conditioner
1. Size it to the room
ENERGY STAR suggests about 5,000 to 6,000 BTU for 100 to 250 sq ft, 8,000 BTU for about 300 to 350 sq ft and 12,000 BTU for about 450 to 550 sq ft. Add capacity for sunny rooms and kitchens.
2. Choose an inverter for quiet and savings
Inverter compressors adjust their speed instead of cycling on and off, so they run quieter and use less electricity.
3. Look for ENERGY STAR
ENERGY STAR certified room air conditioners use less energy than standard models, which saves money all summer.
4. Check your window and power
Measure your window opening and check the unit’s fit. Larger units may need a dedicated outlet or higher-voltage circuit.
5. Plan a safe installation
Window units are heavy. Use the support bracket, have a second person help, and make sure the unit is secure and tilted slightly outward to drain.
Cool your home for less
A few habits help your window AC cool better and cost less to run:
- Clean or wash the filter every couple of weeks during heavy use.
- Close blinds and curtains on sunny windows during the day.
- Use a fan to spread cool air; it lets you set the thermostat a few degrees higher.
- Seal gaps around the unit with the foam panels provided.
- Use schedules or eco mode so it is not cooling an empty room.
Frequently asked questions
What size window AC do I need?
Measure your room’s square footage. As a rough guide, 5,000 to 6,000 BTU suits up to about 250 sq ft, 8,000 BTU about 350 sq ft, and 12,000 BTU about 550 sq ft.
What is the quietest window air conditioner?
U-shaped and saddle-style inverter units, like the Midea U and GE Profile ClearView, are among the quietest because the compressor sits outside.
Are window ACs better than portable ACs?
Usually, yes. Window units are more efficient and quieter for the same cooling, because portable units sit inside and often draw in warm outdoor air.
Can I install a window AC myself?
Most people can install standard units with a helper. Use the support bracket and follow the instructions carefully, especially on upper floors.
How much does it cost to run a window AC?
It depends on size, efficiency, hours used and electricity rates. Inverter and ENERGY STAR models cost noticeably less to run.
Do window ACs work with casement windows?
Most need a vertical sliding window. For casement or sliding windows, look for units designed for them or consider a portable or ductless mini-split system.
The bottom line
For most rooms, the Midea U-Shaped Inverter is the best window air conditioner, with very quiet, efficient cooling and a window that still opens. Choose Windmill for the easiest install, the LG Dual Inverter for larger rooms, or the GE Profile ClearView to keep your view.
More for an efficient home: see the best smart thermostat without a C-wire, the best smart plug with energy monitoring, or browse all Energy Savings guides.
Sources
- ENERGY STAR: room air conditioners
- U.S. Department of Energy: purchasing energy-efficient room air conditioners
- Windmill: The Windmill AC
Featured photo: ‘Window air conditioner’ by IngaMun, licensed under CC BY 2.0.
