The 5 Best Window Air Conditioners for Small Apartments of 2026
A small apartment turns into a sauna fast when the temperature climbs, and a window air conditioner is still the cheapest way to take one room back. We picked five: our Best Overall for quiet inverter cooling, a Best Budget pick that costs less than a dinner out, a Best Quiet for Bedrooms choice for light sleepers, a Best Compact for Narrow Windows unit for narrow windows, and a Best Smart Controls model you can run from your phone. The Midea inverter rose to the top because it runs at 45 dBA while cooling 350 square feet on an Energy Star budget. Here is how each one fits a different kind of apartment life.
| Product | Cooling Performance | Quietness | Energy Efficiency | Value | |
|---|---|---|---|---|---|
 Best OverallMidea 8,000 BTU Smart Inverter with Heat | 9.0 | 9.5 | 9.5 | 8.0 | See PriceAmazon |
 Best BudgetMidea 5,000 BTU EasyCool | 7.5 | 7.0 | 7.5 | 9.5 | See PriceAmazon |
 Best Quiet for BedroomsAmazon Basics 6,000 BTU Window AC | 8.0 | 8.5 | 8.0 | 8.5 | See PriceAmazon |
 Best Compact for Narrow WindowsLG LW5023 5,000 BTU | 7.5 | 8.5 | 8.0 | 8.0 | See PriceAmazon |
 Best Smart ControlsDELLA 6,000 BTU Smart Window AC | 8.0 | 8.0 | 8.0 | 8.5 | See PriceAmazon |
Midea 8,000 BTU Smart Inverter with Heat
Best for
This is for the apartment dweller who wants one unit to handle summer heat, muggy days, and chilly shoulder-season evenings without a second appliance. If your studio or one-bedroom is up to 350 square feet and you will run the AC daily, this is the pick. You would regret the Best Budget here if noise or the power bill bothers you by August.
Why we love it
The variable-speed inverter is the whole story: it ramps the compressor up and down instead of slamming on and off, which is how it holds 45 dBA while conventional units in this class sit in the 50s. That is a genuinely different living experience when the unit is six feet from your couch. The 8,000 BTU capacity covers 350 square feet, and the heat mode plus dry mode mean it earns its keep beyond summer. It is Energy Star certified, and unlike the Best Quiet for Bedrooms Amazon Basics pick, it adds app control and a 24-hour timer to the LED display and remote.
Pros
- 45 dBA, the quietest rating on this list
- Energy Star certified inverter compressor
- Heat plus dehumidifier modes for year-round use
- 8,000 BTU cools up to 350 sq ft
Cons
- 305.99 is double the budget picks
- Needs a 24 to 38.5 inch wide window opening
- Heavier install than the 5,000 BTU units
Verdict
Yes if you cool daily and care about noise and the power bill, because no conventional unit here matches 45 dBA at this price. If you only need a bedroom cooled a few weeks a year, the Best Budget Midea saves you 150 dollars and still gets the job done.
Midea 5,000 BTU EasyCool
Best for
This is for the renter who needs a bedroom cooled and does not want to think about it further. Mechanical knobs, seven temperature settings, and a washable filter: nothing to learn, nothing to break. You would regret the Best Smart Controls pick here if you just want cold air without an app account.
Why we love it
At 153.89 it is the cheapest real window AC worth buying, and 12,181 reviewers rating it 4.4 stars is the strongest social proof on this list. The 5,000 BTU output is honest about its 150 square foot limit, and the CEER of 11.0 keeps the running cost low. It is quieter than a household refrigerator per Midea, so it will not dominate a small bedroom. Unlike the Best Compact for Narrow Windows LG it uses simple mechanical controls that anyone can operate without reading a manual, and the washable filter slides out for a quick rinse.
Pros
- 153.89, lowest price from a major brand
- 4.4 stars across 12,181 reviews
- CEER 11.0 keeps running costs low
- Simple mechanical controls, no learning curve
Cons
- 150 sq ft limit, one room only
- No remote or digital display
- Conventional compressor is louder than inverter picks
Verdict
Yes if your budget is tight and the room is 150 square feet or less. This is the value king. Step up to the Best Quiet for Bedrooms Amazon Basics if you want a remote and digital controls for about 35 dollars more.
Amazon Basics 6,000 BTU Window AC
Best for
This is for the light sleeper and the work-from-home renter whose desk sits under the window. It tops out at 56 dB, which fades into background hum, and the digital display plus remote mean no getting up to fiddle with knobs. You would regret the Best Budget pick if nighttime noise ruins your sleep.
Why we love it
The 6,000 BTU capacity is the sweet spot for a 250 square foot bedroom or living room: meaningfully more cooling than the 5,000 BTU picks without jumping to 8,000 BTU prices. Reviewers consistently call out how easy the install is and how quickly it cools, with 2,226 ratings averaging 4.2 stars. The washable filter captures dust and allergens, a real plus if the unit runs all night near your bed. Compared with the Best Overall Midea inverter it is louder at 56 dB versus 45 dBA, but it costs about 115 dollars less.
Pros
- 6,000 BTU covers up to 250 sq ft
- Tops out at 56 dB for sleep-friendly operation
- Digital display and remote included
- Washable filter traps dust and allergens
Cons
- Conventional compressor cycles audibly
- No heat or dehumidifier modes
- Screwdriver not included in the mounting kit
Verdict
Yes if you want a bedroom unit that stays quiet enough to sleep through at a mid-range price. If silence is the top priority and the budget stretches, the Best Overall inverter runs 11 dB quieter.
LG LW5023 5,000 BTU
Best for
This is for the renter whose windows are too narrow for a standard unit. It fits openings as small as 21 inches wide and 12 inches tall, which covers the skinny bedroom windows common in older apartment buildings. You would regret the Best Budget Midea if it physically does not fit your window.
Why we love it
LG shrank the chassis without shrinking the cooling: 5,000 BTU for 150 square feet, running as low as 50 dB on low mode, which is quieter than the Best Budget Midea. The upward airflow design is a thoughtful touch, pushing cold air toward the ceiling so it circulates instead of blasting your ankles. It uses eco-friendly R32 refrigerant and an Energy Save function to keep the power bill down. Reviewers love the vintage-feeling mechanical knob for dead-simple control, and the slide-out filter makes cleaning a thirty-second job.
Pros
- Fits windows as narrow as 21 inches
- 50 dB on low, quiet for a 5,000 BTU unit
- Upward airflow circulates cold air better
- R32 refrigerant with Energy Save mode
Cons
- 150 sq ft maximum, strictly one small room
- Mechanical controls only, no remote
- Fixed chassis is less forgiving on install
Verdict
Yes if your window is too narrow for standard units, because nothing else here fits a 21-inch opening this well. If your window is a normal 23 to 36 inches, the Best Budget Midea costs less and has far more reviews behind it.
DELLA 6,000 BTU Smart Window AC
Best for
This is for the renter who wants the apartment cool when they walk in. WiFi control, Alexa voice commands, and geo-location triggers mean the unit reacts to your life instead of a wall schedule. You would regret the Best Quiet for Bedrooms Amazon Basics if you hate coming home to a hot apartment.
Why we love it
The smart features are genuinely useful, not gimmicks: start cooling from the train, set a 24-hour timer, or let geo-location handle it. Underneath, it is a solid 6,000 BTU unit for 250 square feet with a CEER of 11.0 and 51 dB operation, quieter than the Best Quiet for Bedrooms pick. At 38.6 pounds and just under 16 inches wide, it is one of the lighter units here, which makes a one-person install realistic. The 4.1 star average across 476 reviews backs up the spec sheet, and sleep mode plus eco mode keep overnight running costs down.
Pros
- WiFi, Alexa voice control, and geo-location
- 51 dB operation, quieter than most smart rivals
- CEER 11.0 with eco and sleep modes
- Light 38.6 lb build for easier install
Cons
- WiFi works on 2.4 GHz networks only
- DELLA is a lesser-known brand than LG or Midea
- App setup adds friction versus plug-and-cool picks
Verdict
Yes if remote control from your phone is a must-have, because it pairs real smart features with respectable 51 dB cooling. If you do not care about apps, the Best Quiet for Bedrooms Amazon Basics gives you the same 6,000 BTU for about 20 dollars less.
Frequently Asked Questions
What size window air conditioner do I need for a small apartment?
Use 5,000 BTU for up to 150 square feet (a bedroom), 6,000 BTU for up to 250 square feet (a bedroom plus home office), and 8,000 BTU for up to 350 square feet (a studio or open living area). If the room gets heavy afternoon sun, size up one band rather than running a small unit flat out.
Are window air conditioners expensive to run?
A 5,000 BTU unit with a CEER of 11.0 draws roughly 450 watts, which costs most renters well under a dollar a day of heavy use. Inverter models and Energy Star certified units cut that further because the compressor ramps down once the room is cool instead of cycling at full power.
Can I install a window AC in a rental apartment?
Usually yes, since window units need no permanent changes, but check your lease and any building rules about bracket supports and seasonal removal first. The install itself takes one person, a screwdriver, and about 30 minutes with the included mounting kit.
Do window air conditioners need a special outlet?
Every unit on this list runs on a standard 115V household outlet. Just plug it directly into the wall, never into an extension cord or power strip, since the compressor draws sustained high current.
Why is my window AC so loud, and can I fix it?
Most noise comes from the compressor cycling on and off at full blast, which is inherent to conventional units. Tightening the mounting, sealing the side panels, and running the fan on low help, but the real fix is an inverter model like our Best Overall pick, which holds 45 dBA because its compressor rarely runs at full speed.
Honorable Mentions
Frigidaire 5,000 BTU Window AC
17,645 reviews at 4.3 stars make it the most proven unit on this list, with 52 dBA quiet operation and auto-restart after power outages. It lost the budget slot to the Midea EasyCool on price alone.
See PriceAmazonFrigidaire 8,000 BTU Window AC
The cheapest way to cool 350 square feet at 229 dollars, with a remote, eco mode, and 54 dBA operation. It lost the overall slot to the Midea inverter, which is quieter and more efficient.
See PriceAmazonWindmill 6,000 BTU Window AC
The design-first pick with double-insulating side panels, an auto-dimming display, and a well rated app, which NYC reviewers call the quietest unit they have owned. It lost on value at 289 dollars for 6,000 BTU.
See PriceAmazon
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