Window Air Conditioners
Best 12000 BTU Window Air Conditioner (2026): 4 Models Side by Side
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For a 12000 BTU window air conditioner, the Della leads this list with 12000 BTU, coverage rated for up to 550 sq ft by the maker, a 56 dB noise figure, app control and a remote. The BLACK+DECKER, GE and LG picks also give 12000 BTU, with noise figures from 53 dB to 66.5 dB and remotes on every pick.
Starting out? See the main guide: Best Window AC Unit
Top picks at a glance
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Best OverallDELLA 12000 BTU Smart Window Air Conditioner9.8 View on Amazon -
9.5 View on Amazon -
9.4 View on Amazon -
Quietest RatedLG 12,000 BTU Window Air Conditioner9.2 View on Amazon
Compare the specs
Ranked on cooling capacity, coverage (maker's figure), rated noise level, phone app control, remote control, inverter heating, eco / energy-saving mode from each listing, plus how many buyers have rated it. A dash (—) means we could not confirm that figure from the listing.
| Pick | Cooling capacity | Coverage (maker's figure) | Rated noise level | Phone app control | Remote control | Inverter heating | Eco / energy-saving mode | Weight | Warranty |
|---|---|---|---|---|---|---|---|---|---|
| 1. DELLA 12000 BTU Smart Window Air Conditioner | 12,000 BTU | 550 sq ft | 56 dB | Yes | Yes | Yes | Yes | 63.7 lb | — |
| 2. BLACK+DECKER Window Air Conditioner 12000 BTU | 12,000 BTU | 550 sq ft | 66.5 dB | — | Yes | — | — | 66.8 lb | 1-year |
| 3. GE 12,000 BTU Smart Window Air Conditioner | 12,000 BTU | — | 59 dB | Yes | Yes | — | Yes | 63.6 lb | 1-year |
| 4. LG 12,000 BTU Window Air Conditioner | 12,000 BTU | 550 sq ft | 53 dB | — | Yes | — | — | 82 lb | 1-year |
DELLA 12000 BTU Smart Window Air Conditioner
It pairs 12000 BTU with 550 sq ft of maker-rated coverage, 56 dB noise, app control and a remote.
- Cooling capacity: 12,000 BTU
- Coverage (maker's figure): 550 sq ft
- Rated noise level: 56 dB
- Phone app control
- Remote control
- Inverter heating
- Eco / energy-saving mode
Good for
- Buyers who want app control with a remote
- Owners of rooms near 550 sq ft who want one unit
Skip it if
- You need noise below 56 dB
- You need coverage above 550 sq ft
It has 3 fan speeds and Auto, Cool, Fan and Dry modes, plus a 24 hour timer and a sleep mode. The Della+ app and Alexa voice control adjust temperature and fan speeds, and the LED panel gives manual control. It has a dry mode, a reusable filter and installation accessories, and it fits windows from 26 to 36 inches wide. It weighs 63.7 lb.
BLACK+DECKER Window Air Conditioner 12000 BTU
It pairs 12000 BTU with 550 sq ft of maker-rated coverage, a remote and a 1-year warranty.
- Cooling capacity: 12,000 BTU
- Coverage (maker's figure): 550 sq ft
- Rated noise level: 66.5 dB
- Remote control
- 1-year warranty stated
Good for
- Buyers who want a remote with sleep mode
- Buyers who want 550 sq ft coverage for a bedroom
Skip it if
- You need noise below 66.5 dB
- You need coverage above 550 sq ft
It has a remote, sleep mode, a 24-hour timer and an energy saver setting. It runs at auto, low, medium and high levels, and it has a HEPA filter. Accordion side panels fit standard double hung windows from 23 to 36 inches wide. It weighs 66.8 lb and carries a 1-year warranty.
GE 12,000 BTU Smart Window Air Conditioner
It pairs 12000 BTU with 59 dB noise, SmartHQ app control, a remote and Eco Mode.
- Cooling capacity: 12,000 BTU
- Rated noise level: 59 dB
- Phone app control
- Remote control
- Eco / energy-saving mode
- 1-year warranty stated
Good for
- Buyers who want SmartHQ app control with Alexa
- Buyers who want Eco Mode with 3 fan speeds
Skip it if
- You need noise below 59 dB
- You need a unit under 63.6 lb
It has 3 cooling modes and 3 fan speeds, and Eco Mode turns off the fan and compressor when the room is cool enough. The SmartHQ app allows monitoring, scheduling and control, and Alexa and Google Assistant compatibility add voice control. It has a slide-out, washable filter and an EZ Mount installation kit. It weighs 63.6 lb and carries a 1-year warranty.
LG 12,000 BTU Window Air Conditioner
It pairs 12000 BTU with 550 sq ft of maker-rated coverage, 53 dB noise and a remote.
- Cooling capacity: 12,000 BTU
- Coverage (maker's figure): 550 sq ft
- Rated noise level: 53 dB, the lowest rated here
- Remote control
- 1-year warranty stated
Good for
- Buyers who want 53 dB noise for a bedroom
- Buyers who want auto restart after a power failure
Skip it if
- You need noise below 53 dB
- You need coverage above 550 sq ft
It has 3 cooling and fan speeds plus Auto Cool mode, and a remote adjusts temperature and modes. It operates as quietly as 53 dB in low mode, and Auto Restart turns it back on after a power failure. It has a washable filter, window curtain panels and batteries in the box. It weighs 82 lb and carries a 1-year warranty.
How to choose
Match BTU and coverage
All four picks give 12000 BTU, so BTU alone will not separate them. The Della, BLACK+DECKER and LG picks give coverage rated for up to 550 sq ft by the maker, so compare that figure with your room size. A room larger than 550 sq ft needs a larger unit or a second unit, while a much smaller room may not need this much capacity.
Compare noise and controls
Noise figures run from 53 dB for the LG to 56 dB for the Della, 59 dB for the GE and 66.5 dB for the BLACK+DECKER. Use the figure to judge how much sound you will hear in the room. For controls, every pick has a remote, and the Della and GE add app control. The GE also adds Alexa and Google Assistant voice control.
Check fit and upkeep
Measure your window before buying, since window widths differ across these picks. The Della fits windows from 26 to 36 inches wide, the BLACK+DECKER fits windows from 23 to 36 inches wide, and the GE fits a double hung window 25 to 36.625 inches wide. For upkeep, the Della has a reusable filter, the GE has a slide-out, washable filter, and the LG has a washable filter. Clean the filter as the maker directs.
FAQ
What size room does a 12000 BTU window air conditioner cool?
The Della, BLACK+DECKER and LG picks give coverage rated for up to 550 sq ft by the maker. Compare that figure with your room size before buying.
Which of these air conditioners has the lowest noise figure?
The LG lists 53 dB in low mode, lower than the Della at 56 dB, the GE at 59 dB and the BLACK+DECKER at 66.5 dB.
Do these air conditioners work with a phone app?
The Della and GE work with a phone app. The Della uses the Della+ app, and the GE uses the SmartHQ app. The BLACK+DECKER and LG picks have a remote.
Do these air conditioners have Eco Mode?
The Della and GE have an eco energy saving mode. The Della gives eco energy saving mode with sleep mode, and the GE gives Eco Mode that turns off the fan and compressor when the room is cool enough.
