Very quiet: its U-shaped design puts much of the compressor outside the window. RTINGS measured about 42 dBA at low compressor operation, and WIRED calls it the quietest window AC its reviewers have tested.
Efficient: inverter technology adjusts cooling output rather than constantly cycling on/off; the 8,000-BTU model has a CEER of 15.
Window can still open: the U-shaped design allows you to open the window after installation—particularly useful in an apartment.
The "best" window air conditioner depends on your budget, room size, and how much you hate loud, clunky AC noises. Reviewers and consumer testing consistently point to a few standout models that reinvented the category using inverter technology and smart designs.[](]()]()
Why it’s great: This has been a top pick across major testing publications. The innovative U-shape allows your window to close tightly into the middle of the unit, using the glass to block compressor noise. It utilizes an inverter compressor that ramps up and down smoothly rather than constantly slamming on and off, making it whisper-quiet (down to 32 dBA on low) and deeply energy-efficient.
Best for: Bedrooms, home offices, and anyone sensitive to noise.
Windmill Smart Air Conditioner with WhisperTech (Best for Design & Ease of Use)
Why it’s great: Traditional window ACs are an eyesore, but Windmill focuses heavily on a clean, modern aesthetic with front-facing angled airflow and an auto-dimming LED display. It also features inverter technology for quiet performance, pre-assembled side installation frames, and slick Wi-Fi/app/voice controls.
Best for: Living rooms and design-conscious spaces where you don’t want an industrial-looking box sticking out of the wall.
Why it’s great: LG’s dual inverter setup cools spaces quickly while running exceptionally quietly for its power class. It easily exceeds baseline Energy Star standards and handles medium-to-large square footage without missing a beat.
Best for: Open-concept areas or larger rooms (up to 450 sq. ft.).
Why it’s great: If you just need basic, dependable cooling for a small bedroom or dorm and don't care about smart phone apps or inverter quietness, budget mechanical units like TCL's smaller offerings cost a fraction of the price (around $180) and are light enough for one person to install easily.
The best window AC units balance cooling power, energy efficiency, noise, and price. Based on recent independent testing and current retail listings, the Midea U-Shaped Smart Inverter is my top overall recommendation, while Frigidaire and other conventional models offer more affordable options.
Top picks at a glance
(Best overall)
1. Midea U-Shaped Smart Inverter Window AC
Typically around $300–$400, depending on capacity and sales
Quiet inverter compressor, efficient operation, and a U-shaped design that lets you open the window partially while the AC is installed. RTINGS ranked it its top window AC.
Best for: bedrooms, living rooms, and people sensitive to noise.
2. LG Dual Inverter Smart Window AC
Around $500 for some 10,000 BTU models
Efficient inverter technology, app control on smart models, and quiet operation. A good alternative if you prefer a traditional rectangular unit.
Best for: medium-to-large rooms and everyday energy savings.
3. Frigidaire FHWC054TE1
Budget-friendly; check current retailer pricing
A straightforward AC with a remote and dehumidification mode. RTINGS names it its best budget window AC for small spaces.
Best for: small bedrooms, home offices, and apartments.
4. GE Profile 8,000 BTU Inverter Window AC
Around $400–$450
Variable-speed inverter cooling, smart features, and a reported low operating sound level. A strong alternative to the Midea if you find a better deal.
Best for: people wanting quiet operation and smart controls.
5. Windmill WhisperTech 8,000 BTU
About $359 at Home Depot at the time of lookup
A modern design, inverter cooling, app and voice controls, and an installation kit designed to simplify setup.
Best for: easy setup, modern aesthetics, and quiet cooling.
Compare highly rated models available to buy
These additional listings have strong retailer ratings. Prices and stock can change.
LG New 8,000 BTU 350 Sq Ft Smart Wi-Fi Enabled Dual Inverter…
A well-sized unit is just as important as the brand. These are approximate starting points from RTINGS' buying guide.
Room size
Cooling capacity
Up to 150 sq. ft.
5,000 BTU
150–350 sq. ft.
8,000 BTU
350–450 sq. ft.
10,000 BTU
450–550 sq. ft.
12,000 BTU
Rooms with intense afternoon sun, high ceilings, or open layouts may need more capacity. Also measure your window before purchasing, especially for U-shaped models.
Midea U (and Midea U Plus) Series Widely considered the gold standard for quiet and efficient cooling. Its innovative U-shaped design allows the window to close tightly in the middle of the unit, which drastically blocks noise and improves safety. It utilizes an inverter compressor for high efficiency and can be found at retailers like Walmart. (Note: Midea addressed previous drainage/mold concerns with updated designs and running on auto mode).
Praised as one of the best non-DIY/easy-install alternatives. It features an aesthetic modern design, angled airflow that pushes air upward, a pre-assembled install kit, and very quiet inverter operation. You can check availability on platforms like The Home Depot.
LG Inverter Series (e.g., LW6023IVSM) : Consistently scores top marks from Consumer Reports for exceptional comfort control, whisper-quiet operation, and reliability during minor brownouts or voltage fluctuations.
The best window air conditioners on the market are not necessarily the coldest or the cheapest. The strongest choices balance cooling performance, energy efficiency, noise, reliability, and ease of installation.
For 2026, I’d compare traditional window units with newer inverter models, which adjust compressor speed instead of repeatedly switching it on and off. Inverter units are often quieter and can use less electricity, particularly when running for long periods in hot weather.
The right choice also depends on your room size. An oversized unit can cool the air quickly without removing humidity as effectively, while an undersized unit may struggle on hot days.
Best window air conditioners to consider
These are the models and product lines I’d put on a shortlist based on 2026 expert testing, efficiency, noise, and value. There isn't one universal winner for every room.
If your window AC is loud enough to keep you awake, I'd prioritize a quiet inverter window air conditioner. Unlike traditional units that repeatedly switch the compressor on and off, inverter models can run at lower speeds, making them much less intrusive in a bedroom.
For a medium-sized bedroom, roughly 150–300 square feet, I'd start by comparing 8,000 BTU inverter models. The quietest choice depends on the manufacturer's noise rating, the room's sun exposure, and whether you need it to cool a hot room in Arizona.
My top 3 quiet window AC picks
(My top pick)
1. Midea U-Shaped 8,000 BTU Inverter AC
Advertised noise: as low as 32 dBA
Its U-shaped design places the compressor outside the window, with the glass helping block sound. It can cool rooms up to about 350 sq. ft. and is my first choice for a noise-sensitive bedroom.
A strong alternative if you prefer a conventional window-unit shape. Its inverter compressor provides smoother, quieter cooling, and it's rated for rooms around 340–350 sq. ft.
Best for: quiet cooling without the U-shaped design.
These are starting points; intense afternoon sun, poor insulation, and Arizona's extreme summer heat can affect sizing. Don't buy a larger unit than you need solely to get quieter operation.
One thing to know before buying
Decibel ratings aren't always measured under the same conditions, so a manufacturer's “32 dBA” claim isn't directly comparable with another brand's Sleep-mode rating. Independent testing also found that the Midea U performs especially well for quiet operation.
My recommendation: start with the Midea U-Shaped 8,000 BTU. It's the one I'd investigate first if sleep is your biggest concern.
One quick question so I can narrow this down: about how big is your bedroom?
For a medium-sized bedroom (typically up to 350 sq. ft.), an 8,000 BTU unit with an inverter compressor is the gold standard for quiet performance. Unlike old-school ACs that constantly clank on and off at full blast, inverter units ramp their motor speed up and down smoothly, running as low as 32 dB to 37 dB—roughly the sound level of a quiet library.[](https://www.youtube.com/watch?v=ztm4PS1TFXs)
The top quiet choices for a medium bedroom include:
Widely praised by The New York Times Wirecutter as a top pick. Its unique U-shaped design allows your window to close right into the middle of the unit, using the thick window sash as a natural sound barrier against the compressor outside. It operates down to an whisper-quiet 32 dB and cools efficiently.
Hisense Inverter 8,000 BTU (HLAW0825TW / ConnectLife Series) A stellar runner-up/alternative that utilizes an L-shaped or slim profile design. It runs exceptionally quietly at around 37 dB, delivers robust cooling and dehumidification, and features strong smart-app integration.
Note on maintenance: Modern ultra-quiet inverter units sit flatter and run longer continuous cycles, so be sure to check and clean the filter regularly and ensure proper outward-slanting drainage to prevent any mold issues.[](https://www.nytimes.com/wirecutter/reviews/best-air-conditioner/)
Would you like help comparing pricing and availability for these models, or do you have a specific window type (like sliding or casement) we should factor in?
Good Housekeeping's top overall pick in its 2026 testing. It cooled rooms quickly, maintained the target temperature well, and has an automatic restart feature for power interruptions. The main drawback is more noticeable fan noise at high speed.
Best for: everyday cooling in bedrooms, offices, and living spaces.
LG ·
2. Midea U-Shaped Inverter Window AC
Often around $350–$500, depending on capacity and model
A strong option if quiet operation is your priority. Its U-shaped design places much of the compressor outside the window and lets you open the window while the unit remains installed. Inverter technology also helps reduce energy use.
Best for: bedrooms, light sleepers, and people who want to reduce outdoor noise.
Important: check the exact model number and recall status before purchasing an older unit.
Good Housekeeping highlighted its preassembled installation frame, quiet operation, Wi-Fi controls, and efficient inverter design. Its rated capacity is suitable for rooms up to about 350 sq. ft.
Best for: renters and buyers who want modern features without a premium price.
A basic, inexpensive unit for a small bedroom or home office. It performed well for its price in expert testing, but has manual controls, no remote, and less precise temperature regulation.
Best for: small rooms, tight budgets, or cooling a room only occasionally.
A stylish, quiet alternative with inverter technology, app control, and a design that blends into a room better than many traditional units. Good Housekeeping praised its cooling efficiency and low noise.
Best for: bedrooms, home offices, and design-conscious buyers.
Good Housekeeping's testing found the 12,000-BTU Kühl particularly effective at cooling large spaces, up to around 550 sq. ft. However, it's heavy, bulky, and not the quietest choice. Check the precise model and current availability before buying.
Best for: large living areas where cooling power matters more than compact size.
Use this as a starting point, then adjust for strong sunlight, ceiling height, kitchen heat, and room layout.
Room size
Approx. cooling capacity
100–150 sq. ft.
5,000 BTU
150–250 sq. ft.
6,000 BTU
250–350 sq. ft.
8,000 BTU
350–450 sq. ft.
10,000 BTU
450–550 sq. ft.
12,000 BTU
For hot, humid climates, I'd pay particular attention to humidity removal, reliable cooling during extreme heat, and energy consumption over long operating hours. An ENERGY STAR-certified inverter model is a good place to start.
My recommendation
Best all-around: LG 8,000 BTU, if its capacity fits your room.
Best for quiet operation: Midea U-shaped inverter.
Best value: Frigidaire FFRA0511R1 for a small room.
Best balance of features and installation convenience: TCL Q-Series inverter.
These are shortlist recommendations, not a definitive ranking of every model available. Prices and model revisions can change, so verify current specifications before buying.
One question so I can narrow this down: How large is the room you're trying to cool?
