Best 15,000 BTU Window Air Conditioners: Top 8 Picks (November 2026)
The best 15,000 BTU window air conditioners include the DELLA 14000 BTU Energy Saving Window Air for large living rooms, the Midea 14 for energy savings, and the Midea 12 for bedrooms and open windows.
On this page (9 sections)
- The best 15,000 BTU window air conditioners by room and need
- How these window units compare
- How we compared these units
- What size window AC does a 700 sq ft room need?
- Standard compressor or inverter: which should you buy?
- What should you check before buying a large window unit?
- Does a bigger window AC always cool better?
- How much does it cost to run a large window AC?
- Verdict: which large window AC should you buy?
The best 15,000 BTU window air conditioner for most large rooms is the DELLA 14000 BTU, because it cools up to 700 sq ft, runs as low as 54 dB and adds Wi-Fi control. Pick the Midea 14,000 BTU inverter when lower power bills matter more, or a smaller unit if your room is under 550 sq ft.
Shoppers searching for the best 15000 btu window air conditioner usually land on 14,000 to 14,300 BTU models, since that is the size most brands sell for rooms around 700 sq ft. The units here all sit in that band, so the real decision is noise, efficiency, controls and window fit.
Our how to choose a window air conditioner guide covers the basics if this is your first unit. If you are still sizing the room, our explainer on how many btu per square foot an air conditioner needs will tell you whether 14K is right or too much.
Our picks at a glance
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1
Best for large living roomsDELLA 14000 BTU Energy Saving Window Air
9.7/10 our score
See it on Amazon -
2
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3
- 4
Check itLG 5000 BTU Window Air Conditioners [2023
Best for small rooms - 5
Check itGE Window Air Conditioner 14000 BTU
Best for smart-home setups - 6
Best for extra-large roomsCheck it - 7
Check itBLACK+DECKER Window Air Conditioner 14300 BTU
Best for simple remote control - 8
Best for rentersCheck it
The best 15,000 BTU window air conditioners by room and need
The DELLA 14K is the strongest all-round pick for a large living room, and each unit below wins on a different need. Match the room, the noise tolerance and the control style before comparing small features.
Our score weighs specs, features and buyer feedback against what you're shopping for.
DELLA 14000 BTU Energy Saving Window Air: Best for large living rooms
- Cools up to 700 sq ft
- CEER 10.7
- Wi-Fi with DELLA+ app
- 54 dB low noise
A large-room window unit with app control, a 24-hour timer and four modes, built for living rooms and family rooms.
Pros
- Wi-Fi, app and voice control
- Quiet 54 dB rating
- Complete install kit included
Cons
- No inverter compressor
- 69.4 lb needs two people to lift
DELLA suits a living room or family room where the unit has to cool 700 sq ft without dominating the conversation. The 54 dB low setting keeps fan noise in the background while you watch TV or read.
Wi-Fi control through the DELLA+ app, plus Alexa and Google Assistant, means you can cool the room before you get home. A 24-hour timer and four modes (Auto, Cool, Fan and Dry) cover everyday use without fuss.
The CEER of 10.7 is a solid efficiency figure for a standard compressor, though an inverter unit will still cost less to run over a long summer. At 69.4 lb it needs two people to lift into the window, and the 26 to 36 in fit range covers most double-hung windows.
Its trade-off against the Midea 14,000 BTU is running cost. The DELLA leans on smart controls and quiet operation, while the Midea invests in inverter efficiency.
Pick the DELLA for smart features and easy installation; choose the Midea for lower bills.
Midea 14: Best for energy savings
- 14,000 BTU inverter
- Cools up to 700 sq ft
- 41 dBA low noise
- SmartHome app, Alexa and Google
An inverter model that trims running costs and noise, with app and voice control for large rooms.
Pros
- Inverter saves energy
- Quietest large pick here
- Washable front-access filter
Cons
- Costs more than a standard unit
- Slightly smaller window fit range
Midea suits a big room where the unit runs all day and the power bill shows it. Its variable-speed inverter is rated more than 40% more efficient than the Energy Conservation Standard, which adds up over a long cooling season.
Noise is the other draw: 41 dBA on low makes it the quietest large unit in this guide. If your 700 sq ft room is a bedroom or an open living space, that low hum is easier to live with than a standard compressor.
App, remote and voice control all work through the SmartHome app and Alexa or Google Assistant. The washable filter pulls out from the front, so cleaning takes a minute.
The trade-off is upfront cost. Inverter units usually cost more than standard-compressor models, so the savings come back over time rather than on day one.
It also needs a slightly narrower window than some rivals.
Choose it if you want the lowest running costs and quietest operation for a large room. Skip it if you want the cheapest unit today.
Midea 12: Best for bedrooms and open windows
- 12,000 BTU U-shape
- Cools up to 550 sq ft
- 32 dBA low noise
- Window can still open
A U-shaped unit that lets the window close around it and open for fresh air, with very low noise for a bedroom.
Pros
- Window opens with the unit installed
- 32 dBA quietest here
- Anti-theft window lock
Cons
- Smaller capacity than the 14K units
- U-shape needs a 22 to 36 in window
Midea's U-shaped model suits a bedroom or office where you want the window to still open. The design wraps around the sash so the window can close and open around it, keeping your view and letting in fresh air on mild evenings.
At 12,000 BTU it cools up to 550 sq ft, so it's the pick when your "large room" is really a big bedroom or a small open-plan space rather than a 700 sq ft living room. The 32 dBA low setting is the quietest in this roundup by a wide margin.
An anti-theft mechanism locks the window when it's closed. The quick-snap bracket handles single or double-hung windows from 22 to 36 in wide.
Its trade-off is capacity. If your room is 700 sq ft or close to it, the U-shape will struggle on the hottest afternoons.
See our roundup of the best window air conditioners for a bedroom for more options at this size.
Pick it for a bedroom where quiet matters most and the window should still work. Choose a 14K unit if the room is bigger.
LG 5000 BTU Window Air Conditioners [2023: Best for small rooms
- 5,000 BTU
- Cools up to 150 sq ft
- 50 dB low mode
- Mechanical controls
A compact unit for a single small room, with simple dial controls and a light 36.4 lb body.
Pros
- Light and easy to install
- Washable slide-out filter
- Energy Save function
Cons
- Covers only 150 sq ft
- Mechanical controls, no remote
The LG 5,000 BTU model suits a small room that needs its own cooling without a big unit taking over the window. At 150 sq ft, it covers a bedroom, home office or dorm room and weighs just 36.4 lb.
Mechanical controls keep operation simple: turn the dial, pick a fan speed and let the unit run. Two cooling modes and two fan speeds are enough for a single room, and the Energy Save function trims power use when the room is already cool.
The 50 dB low setting is quiet enough for a small bedroom. The slide-out washable filter cleans easily, and the EZ Mount kit fits double-hung windows from 21 to 35 in wide.
The trade-off against the large units here is obvious: 5,000 BTU won't cool a 700 sq ft room. But for one small room, it is far easier to install and to remove for winter.
Our 10,000 BTU window air conditioner roundup is the next step up if your room is bigger than 150 sq ft.
Choose it for a single small room. Look elsewhere if you need to cool more than 150 sq ft.
GE Window Air Conditioner 14000 BTU: Best for smart-home setups
- 14,000 BTU
- Cools up to 700 sq ft
- SmartHQ app, Alexa and Google
- ENERGY STAR
A large ENERGY STAR unit with app, voice and remote control, plus eco mode and a 24-hour timer.
Pros
- Energy Star certified
- Eco mode cuts energy use
- App, voice and remote control
Cons
- 63 dB is loud next to quiet rivals
- 72 lb fixed chassis
GE's 14,000 BTU unit suits a smart home where the AC should answer to a voice command or the SmartHQ app. It cools up to 700 sq ft and carries ENERGY STAR certification for lower energy use.
Eco Mode turns off the fan and compressor once the room hits your target, so the unit isn't running flat out when it doesn't need to. Three cooling modes and three fan speeds let you fine-tune comfort.
The EZ Mount kit fits double-hung windows from 25 to 36.625 in wide. A slide-out washable filter keeps maintenance simple.
The main trade-off is noise. At 63 dB it's noticeably louder than the Midea inverter or the DELLA, so a living room or bedroom near a quiet zone will hear it.
Its fixed 72 lb chassis also makes installation a two-person job.
Choose it for smart controls and Energy Star efficiency in a large room. Skip it if low noise is your top priority.
LG 14: Best for extra-large rooms
- 14,000 BTU dual inverter
- Cools up to 800 sq ft
- 44 dB sleep mode
- LG ThinQ, Alexa and Google
The biggest stated coverage here, with dual inverter efficiency and quiet sleep mode.
Pros
- Covers up to 800 sq ft
- Dual inverter saves energy
- Quiet 44 dB sleep mode
Cons
- Bulky 23.62 in wide cabinet
- Higher cost than standard units
LG's 14,000 BTU dual inverter model suits the biggest rooms here, with coverage up to 800 sq ft. That extra reach matters for an open-plan living and dining area or a large apartment.
Dual inverter technology is rated up to 35% more energy savings than the Energy Star requirement. The BLDC motor and dual inverter compressor also bring noise down to 44 dB in sleep mode.
The LG ThinQ app, Alexa and Google Assistant give you app and voice control. A washable dust filter and a filter light reminder make upkeep easy.
The trade-off is size and cost. Its 23.62 in wide cabinet needs a bigger window opening than most rivals, and dual inverter units cost more upfront.
The 28.03 in depth also means more of the unit sticks out.
Pick it when your room is closer to 800 sq ft and you want efficiency and smart control. For 700 sq ft or less, the DELLA or Midea 14,000 BTU is easier to fit and cheaper to buy.
BLACK+DECKER Window Air Conditioner 14300 BTU: Best for simple remote control
- 14,300 BTU
- Cools up to 700 sq ft
- Full function remote
- R32 refrigerant
A straightforward large-room unit with a full remote and accordion side panels for an easy fit.
Pros
- Full function remote
- Accordion panels fit 23 to 36 in windows
- R32 refrigerant
Cons
- No app or voice control
- 19 in deep cabinet sticks out more
BLACK+DECKER's 14,300 BTU unit suits a buyer who wants large-room cooling with a simple remote and no app setup. The full-function remote controls every setting, and accordion side panels fit double-hung windows from 23 to 36 in wide.
Its 11.2 CEER is efficient for a standard compressor, and R32 refrigerant keeps the environmental impact low. Four fan levels (auto, low, medium and high) plus sleep mode and an energy saver cover everyday use.
It cools up to 700 sq ft, so it's a direct rival to the DELLA and GE units. The 19 in deep cabinet sticks out more than the Midea inverter's 18.98 in.
The trade-off against the smart units here is control. There's no Wi-Fi, app or voice option, so you'll always need the remote or the panel.
In return, the accordion panels make it one of the simpler large units to install in a standard window.
Choose it for simple, efficient cooling in a large room without smart features. Skip it if you want app control.
GE 14: Best for renters
- 14,000 BTU
- Cools up to 700 sq ft
- SmartHQ app, Alexa and Google
- Drain outlet for storage
A smart large-room unit with a quick install kit and a drain outlet for easy end-of-season removal.
Pros
- Smart app and voice control
- Install kit included
- Drain outlet for storage
Cons
- Not ENERGY STAR rated
- Needs two people to install
The GE 14,000 BTU smart model suits renters and anyone who takes the unit out each winter. Its drain outlet lets moisture out before storage, and the quick install kit needs no permanent changes to the window frame.
It cools up to 700 sq ft with three cooling modes and three fan speeds. The SmartHQ app, Alexa and Google Assistant handle remote and voice control, so you can set a schedule from your phone.
Eco Mode cycles the compressor only when needed. The washable filter needs cleaning every 30 days to keep performance up.
The trade-off is efficiency. It isn't Energy Star rated, so it will cost more to run than the Midea inverter or the GE Energy Star unit.
At 66.1 lb it still needs two people to lift, though it's lighter than the GE Energy Star model.
Choose it if you rent and want smart control plus easy seasonal removal. Pick the Energy Star GE or the Midea inverter for lower running costs.
How these window units compare
The comparison table lines up cooling power, room coverage and efficiency so you can see how the large units differ. Capacity and coverage tell you what room each unit fits; efficiency and noise decide what it costs to live with.
| Product | Best for | Cooling power | Room size | Window fit | Our score |
|---|---|---|---|---|---|
| DELLA 14000 BTU Energy Saving Window Air | large living rooms | 14,000 BTU | Up to 700 sq ft | 26 to 36 in wide, 16 in high min | 9.7 |
| Midea 14 | energy savings | 14,000 BTU | Up to 700 sq ft | 9.5 | |
| Midea 12 | bedrooms and open windows | 12,000 BTU | Up to 550 sq ft | 9.5 | |
| LG 5000 BTU Window Air Conditioners [2023 | small rooms | 5,000 BTU | Up to 150 sq ft | 9.4 | |
| GE Window Air Conditioner 14000 BTU | smart-home setups | 14,000 BTU | Up to 700 sq ft | 9.1 | |
| LG 14 | extra-large rooms | 14,000 BTU | Up to 800 sq ft | 8.8 | |
| BLACK+DECKER Window Air Conditioner 14300 BTU | simple remote control | 14,300 BTU | Up to 700 sq ft | 8.5 | |
| GE 14 | renters | 14,000 BTU | Up to 700 sq ft | 8.4 |
How we compared these units
We ranked these units on cooling capacity, stated room coverage, efficiency and noise, then weighed controls, window fit and installation against what a large-room buyer needs. Scores reflect how well each unit matches the search for a 14,000 to 15,000 BTU window air conditioner.
We based this guide on the published specs from each maker, compared side by side. That is why the noise figure, CEER or inverter rating and window fit matter more in this guide than marketing language.
The highest score went to the unit that balances large-room coverage, quiet operation and smart control without a big compromise. Inverter units score well on running costs but lose points when they cost more or fit fewer windows.
What size window AC does a 700 sq ft room need?
A 700 sq ft room needs about 14,000 BTU in a typical home. That's why the large units here sit at 14,000 to 14,300 BTU rather than a full 15,000.
The old rule of 20 BTU per sq ft is a starting point, not a guarantee. A sunny room with big west-facing windows, a kitchen with appliances running or a room with several people in it needs more cooling than a shaded bedroom of the same size.
A shaded, well-insulated room may be comfortable with less.
If your room is closer to 800 sq ft, step up to the LG dual inverter, which states coverage up to 800 sq ft. For a room under 550 sq ft, a 12,000 BTU unit like the Midea U-shape is the better fit.
Sizing too big wastes energy and cools unevenly; sizing too small leaves you hot on the worst days.
Measure the room's length times width for the floor area, then add a margin for sun and heat sources. Our BTU per square foot guide walks through the adjustments room by room.
Standard compressor or inverter: which should you buy?
An inverter unit costs less to run over a long summer and is usually quieter. A standard compressor unit costs less upfront and is simpler to repair.
Inverter models vary compressor speed instead of switching fully on and off. That steady running uses less electricity and holds the room temperature more evenly.
The Midea 14,000 BTU, Midea U-shape and LG dual inverter here all use inverter technology.
Standard units like the DELLA and both GE models are cheaper to buy. They cycle on and off, which can feel like small temperature swings and makes more noise when the compressor kicks in.
If the unit runs only a few hours a day in a mild climate, the upfront saving may matter more than the running cost.
When an inverter is worth the extra cost
An inverter pays back when the unit runs most days through a hot season. If you cool a living room every afternoon from June to September, the lower power draw adds up.
If the unit is for a guest room used a few weeks a year, a standard compressor is the smarter buy.
What should you check before buying a large window unit?
Check the window opening, the circuit and the weight before you buy. A large unit that doesn't fit, trips the breaker or can't be lifted safely is the wrong unit no matter how good the specs look.
Window fit comes first. The units here need openings from about 21 to 37 in wide and 12 to 16 in high depending on the model.
Measure the actual opening, not the glass, and confirm the window type. Most of these fit double-hung windows; the Midea U-shape handles single or double-hung.
Electrical and weight checks
A 14,000 BTU unit runs on a standard 115V circuit and draws close to a full 15-amp load. Don't share the outlet with a microwave or space heater.
Check the breaker size and whether the outlet is on its own circuit.
Weight matters for installation and for the window frame. These units run 63 to 72 lb.
Plan for two people to lift one into place, and use the included bracket or support so the unit doesn't stress the sash. Renters should confirm the landlord allows a window unit and that the bracket doesn't need drilling.
Does a bigger window AC always cool better?
No. A larger unit can cool a small room too fast, leaving it cold and clammy before it removes the humidity.
That's the most common mistake buyers make when they size up.
An oversized unit short-cycles: it blasts cold air, hits the thermostat setting quickly and shuts off before the room's moisture has been pulled out. The room feels cold but sticky.
A right-sized unit runs longer, removes more humidity and feels more comfortable.
Match the BTU to the room, then add capacity only for real heat loads like direct sun or a kitchen. If your room is 550 sq ft or less, a 12,000 BTU unit is a better match than any of the large models here.
The 10,000 BTU roundup covers the next size down if you're between steps.
How much does it cost to run a large window AC?
Running a 14,000 BTU window unit costs more than a smaller model, but an efficient unit narrows the gap. The difference between the best and worst units here shows up over a full season.
Power use depends on the efficiency rating and how long the unit runs. An inverter model like the Midea 14,000 BTU or LG dual inverter draws less on average because it doesn't run the compressor flat out.
A standard unit with a high CEER, like the DELLA at 10.7 or the BLACK+DECKER at 11.2, is more efficient than a low-rated standard model.
Habits that cut the bill
Set the thermostat a few degrees higher than you think you need and use the fan to move air. Run the unit on a timer so it isn't cooling an empty room.
Clean the filter every 30 days so airflow stays strong and the compressor doesn't work harder than it should. Close blinds on the sunny side during the hottest hours.
Verdict: which large window AC should you buy?
For most large rooms, buy the DELLA 14000 BTU. It covers 700 sq ft, runs quietly at 54 dB and adds Wi-Fi and voice control, making it the best 15,000 BTU class window air conditioner for everyday living rooms and family rooms.
Choose the Midea 14,000 BTU inverter if running costs matter most. Pick the Midea U-shape for a bedroom where the window should still open.
The LG 14,000 BTU dual inverter suits rooms up to 800 sq ft. For a small room, the LG 5,000 BTU is the light, simple choice.
For smart controls at a lower upfront price, either GE model works. The DELLA remains the pick that balances coverage, noise and control for the widest range of large rooms.
Our top 3 picks at a glance
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1
Best for large living rooms
DELLA 14000 BTU Energy Saving Window Air
9.7/10 our score
See it on Amazon -
2
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3
Frequently asked questions
Is a 14,000 BTU window AC the same as a 15,000 BTU one?
They are close but not identical. A 14,000 BTU unit covers about 700 sq ft, while a 15,000 BTU model typically adds a little more cooling for a very large or sunny room.
The units in this guide are 14,000 to 14,300 BTU, the closest match most makers sell.
How big a room will a 14,000 BTU window air conditioner cool?
About 700 sq ft in a typical room, and up to 800 sq ft for the LG dual inverter pick here. A sunny kitchen or a room full of people needs more capacity than a shaded bedroom of the same size.
Do these window units need a dedicated outlet?
Most 14,000 BTU window units run on a standard 115V household circuit. They draw close to the top of a 15-amp circuit, so avoid sharing the outlet with a microwave or space heater.
Can I install a large window air conditioner without help?
Plan on two people. The 14,000 BTU units here weigh 63 to 72 lb, and lifting one into a window while fitting the bracket is awkward alone.
A second person also helps seat the unit safely.
Will a window AC fit my window?
Check the width and minimum height first. Most 14,000 BTU units here need a window 25 to 37 in wide and about 14 to 16 in high.
Measure the opening before you order so you don't have to return a heavy unit.
