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Best LG Air Conditioner: Reviews by Spec

The LG Dual Inverter ThinQ 14,000 BTU Window leads because it states 14,000 BTU, 800 square feet of coverage, ENERGY STAR certification, an inverter compressor, and a 44 db noise figure. We compared published specifications for LG window and portable units, ranking window models on stated BTU and portables on seasonally adjusted cooling capacity where listed. The LG Smart 10,000 BTU Portable is the portable pick, rated on its SACC figure. No unit was handled; every number comes from maker listings. These LG air conditioner reviews compare the figures LG publishes.

Product data updated November 6, 2026

On this page
  1. Compare at a glance
  2. The picks
  3. How we picked
  4. Window vs Portable: Which LG Fits
  5. Matching BTU to Room Size
  6. Noise and Inverter Compressors
  7. Smart Features and Wi-Fi
  8. Questions people ask

Compare at a glance

ModelTypeRated coolingRoom sizeRated noiseENERGY STARBuy
LG Dual Inverter ThinQ 14,000 BTU WindowWindow14,000 BTUUp to 800 sq ftNot listedYesCheck price on Amazon
LG LW1522FVSM 14,000 BTUWindow14,000 BTUUp to 700 sq ftNot listedNot listedCheck price on Amazon
LG Dual Inverter 23,500 BTUWindow23,500 BTUUp to 1,440 sq ftNot listedNot listedCheck price on Amazon
LG LW2521ERSMWindow24,500 BTUUp to 1,560 sq ftNot listedNot listedCheck price on Amazon
LG ThinQ Alexa 12,000 BTUWindow12,000 BTUUp to 550 sq ftNot listedYesCheck price on Amazon
LG LW1224RSMX 12,000 BTUWindow12,000 BTUUp to 550 sq ftNot listedNot listedCheck price on Amazon
LG LW1022FVSM 10,000 BTUWindow10,000 BTUUp to 450 sq ftNot listedNot listedCheck price on Amazon
LG LW8024RSMX 8,000 BTUWindow8,000 BTUUp to 350 sq ftNot listedNot listedCheck price on Amazon
LG LW6024RSMX 6,000 BTUWindow6,000 BTUUp to 250 sq ftNot listedNot listedCheck price on Amazon
LG LW5025R 5,000 BTUWindow5,000 BTUUp to 150 sq ftNot listedNot listedCheck price on Amazon
LG Smart 10,000 BTU PortablePortable6,000 BTU SACCUp to 250 sq ftNot listedNot listedCheck price on Amazon

Specs are the figures each maker lists. "Not listed" means we have no published figure yet.

The picks

No. 1Best overall LG window unit

LG Dual Inverter ThinQ 14,000 BTU Window

Type
Window
Rated cooling
14,000 BTU
Room size
Up to 800 sq ft
Rated noise
Not listed
ENERGY STAR
Yes

This unit leads because it states 14,000 BTU, 800 square feet of coverage, ENERGY STAR certification, and a 44 db noise figure with an inverter compressor. Compared with the LG LW1522FVSM 14,000 BTU below, it adds ENERGY STAR and a lower noise figure. Compared with the smaller LG ThinQ Alexa 12,000 BTU, it offers more cooling capacity.

Why it made the list

  • 14,000 BTU with 800 square feet stated coverage
  • ENERGY STAR certified
  • 44 db noise figure with inverter compressor
  • Wi-Fi, app, remote, touch and voice control

Trade-offs

  • 85.1 pounds, heavier than smaller units
  • 115 volt plug only
  • No heating mode listed

Good fit if

  • Large living rooms up to 800 square feet
  • Homes wanting app and voice control

Skip if

  • You need heating as well as cooling
  • You want a lighter unit for frequent removal

Bottom line: This is the strongest all-around LG window pick for large rooms with smart features.

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No. 2Best 14,000 BTU alternative

LG LW1522FVSM 14,000 BTU

Type
Window
Rated cooling
14,000 BTU
Room size
Up to 700 sq ft
Rated noise
Not listed
ENERGY STAR
Not listed

This model states 14,000 BTU and 700 square feet of coverage with an inverter compressor and Wi-Fi. It ranks just below the LG Dual Inverter ThinQ 14,000 BTU Window because it does not list ENERGY STAR certification and has a 53 db noise figure. Compared with the LG ThinQ Alexa 12,000 BTU below, it adds cooling capacity.

Why it made the list

  • 14,000 BTU with 700 square feet stated coverage
  • Inverter compressor and Wi-Fi
  • 115 volt plug
  • Filter light reminder and dehumidifier

Trade-offs

  • 53 db noise figure, louder than top pick
  • ENERGY STAR certification not listed
  • 85 pounds, heavy

Good fit if

  • Rooms around 700 square feet
  • Users who want an inverter compressor and Wi-Fi

Skip if

  • You want the quietest 14,000 BTU unit
  • You need ENERGY STAR certification

Bottom line: A solid large-room LG window unit with inverter efficiency and smart controls.

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No. 3Best quiet high-capacity unit

LG Dual Inverter 23,500 BTU

Type
Window
Rated cooling
23,500 BTU
Room size
Up to 1,440 sq ft
Rated noise
Not listed
ENERGY STAR
Not listed

This unit states 23,500 BTU and 1,440 square feet of coverage with a 44 db noise figure and inverter compressor. It ranks above the LG 24,500 BTU because it is quieter and has a higher SEER figure, but below the 14,000 BTU picks for smaller rooms.

Why it made the list

  • 23,500 BTU with 1,440 square feet stated coverage
  • 44 db noise figure with inverter compressor
  • Dehumidifier and filter light reminder
  • Silent mode and Wi-Fi

Trade-offs

  • 230 volt plug, not standard 115 volt
  • ENERGY STAR certification not listed
  • 30.25 inches deep; weight not stated by the maker

Good fit if

  • Very large rooms or open floor plans
  • Buyers who want silent mode and Wi-Fi

Skip if

  • You need a 115 volt unit
  • You need heating as well as cooling

Bottom line: The quietest way to cool a very large LG space.

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No. 4Largest stated coverage

LG LW2521ERSM

Type
Window
Rated cooling
24,500 BTU
Room size
Up to 1,560 sq ft
Rated noise
Not listed
ENERGY STAR
Not listed

This model states 24,500 BTU and 1,560 square feet of coverage, the largest in this guide. It ranks below the LG Dual Inverter 23,500 BTU because it has a 61 db noise figure and no inverter compressor listed. Compared with the LG ThinQ Alexa 12,000 BTU below, it covers a far larger stated area but lists 230 volts.

Why it made the list

  • 24,500 BTU with 1,560 square feet stated coverage
  • Silent mode and Wi-Fi
  • App, remote, touch and voice control
  • Filter light reminder

Trade-offs

  • 61 db noise figure, louder than inverter models
  • No inverter compressor listed
  • 132 pounds, very heavy

Good fit if

  • The largest open areas or great rooms
  • Spaces where maximum cooling matters more than noise

Skip if

  • You want quiet operation
  • You need a 115 volt unit

Bottom line: The highest-capacity LG window unit for the largest rooms.

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No. 5Best 12,000 BTU ENERGY STAR pick

LG ThinQ Alexa 12,000 BTU

Type
Window
Rated cooling
12,000 BTU
Room size
Up to 550 sq ft
Rated noise
Not listed
ENERGY STAR
Yes

This unit states 12,000 BTU, 550 square feet of coverage, ENERGY STAR certification, and a 44 db noise figure. It ranks below the larger 14,000 BTU models but above the LG LW1224RSMX 12,000 BTU because of its lower noise figure and ENERGY STAR status. Compared with the LG LW1022FVSM 10,000 BTU below, it adds cooling capacity.

Why it made the list

  • 12,000 BTU with 550 square feet stated coverage
  • ENERGY STAR certified
  • 44 db noise figure
  • Inverter compressor and Wi-Fi

Trade-offs

  • No wattage or weight listed
  • No heating mode listed
  • 115 volt plug only

Good fit if

  • Bedrooms or living rooms around 550 square feet
  • Users who want ENERGY STAR and Alexa control

Skip if

  • You need a larger room cooled
  • You need heating as well

Bottom line: A quiet, efficient mid-size LG window unit with smart control.

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No. 6Best 12,000 BTU alternative

LG LW1224RSMX 12,000 BTU

Type
Window
Rated cooling
12,000 BTU
Room size
Up to 550 sq ft
Rated noise
Not listed
ENERGY STAR
Not listed

This model states 12,000 BTU and 550 square feet of coverage with Wi-Fi and multiple fan speeds. It ranks below the LG ThinQ Alexa 12,000 BTU because it has a 53 db noise figure and does not list ENERGY STAR certification. Compared with the LG LW1022FVSM 10,000 BTU below, it adds cooling capacity.

Why it made the list

  • 12,000 BTU with 550 square feet stated coverage
  • Wi-Fi, app and remote control
  • Multiple cooling and fan speeds
  • Filter light reminder

Trade-offs

  • 53 db noise figure, louder than top 12,000 BTU pick
  • ENERGY STAR certification not listed
  • 82 pounds, heavy for a 12,000 BTU unit

Good fit if

  • Rooms around 550 square feet
  • Users who want app and remote control

Skip if

  • You want the quietest 12,000 BTU unit
  • You need ENERGY STAR certification

Bottom line: A capable mid-size LG window unit with smart features.

Check price on Amazon
No. 7Best 10,000 BTU window unit

LG LW1022FVSM 10,000 BTU

Type
Window
Rated cooling
10,000 BTU
Room size
Up to 450 sq ft
Rated noise
Not listed
ENERGY STAR
Not listed

This unit states 10,000 BTU and 450 square feet of coverage with a 44 db noise figure, inverter compressor, and Wi-Fi. It ranks below the 12,000 BTU models because it cools a smaller area. Compared with the LG LW8024RSMX 8,000 BTU below, it adds capacity and a lower noise figure.

Why it made the list

  • 10,000 BTU with 450 square feet stated coverage
  • 44 db noise figure with inverter compressor
  • Wi-Fi, app, remote, touch and voice control
  • Filter light reminder and dehumidifier

Trade-offs

  • ENERGY STAR certification not listed
  • 62.8 pounds, heavy for a 10,000 BTU unit
  • 115 volt plug only

Good fit if

  • Bedrooms or offices around 450 square feet
  • Users who want quiet inverter operation

Skip if

  • You need to cool a room larger than 450 square feet
  • You need ENERGY STAR certification

Bottom line: A quiet, feature-rich LG window unit for medium rooms.

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No. 8Best 8,000 BTU window unit

LG LW8024RSMX 8,000 BTU

Type
Window
Rated cooling
8,000 BTU
Room size
Up to 350 sq ft
Rated noise
Not listed
ENERGY STAR
Not listed

This model states 8,000 BTU and 350 square feet of coverage with Wi-Fi and multiple fan speeds. It ranks below the LG LW1022FVSM 10,000 BTU because it cools a smaller area and has a 52 db noise figure. Compared with the LG LW6024RSMX 6,000 BTU below, it adds capacity for larger bedrooms.

Why it made the list

  • 8,000 BTU with 350 square feet stated coverage
  • Wi-Fi, app, remote and voice control
  • Multiple cooling and fan speeds
  • 44 pounds, lighter than larger units

Trade-offs

  • 52 db noise figure
  • No inverter compressor listed
  • ENERGY STAR certification not listed

Good fit if

  • Small bedrooms or home offices around 350 square feet
  • Users who want app control in a compact unit

Skip if

  • You need to cool a room larger than 350 square feet
  • You want the quietest operation

Bottom line: A practical mid-small LG window unit with smart controls.

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No. 9Best 6,000 BTU window unit

LG LW6024RSMX 6,000 BTU

Type
Window
Rated cooling
6,000 BTU
Room size
Up to 250 sq ft
Rated noise
Not listed
ENERGY STAR
Not listed

This unit states 6,000 BTU and 250 square feet of coverage with Wi-Fi and multiple fan speeds. It ranks below the LG LW8024RSMX 8,000 BTU because it cools a smaller area. Compared with the LG LW5025R 5,000 BTU below, it lists Wi-Fi and app control.

Why it made the list

  • 6,000 BTU with 250 square feet stated coverage
  • Wi-Fi, app, remote and voice control
  • Multiple cooling and fan speeds
  • 37 pounds, light

Trade-offs

  • 52 db noise figure
  • No inverter compressor listed
  • ENERGY STAR certification not listed

Good fit if

  • Small bedrooms or dorm rooms around 250 square feet
  • Users who want app control in a small unit

Skip if

  • You need to cool a room larger than 250 square feet
  • You want a simple non-Wi-Fi unit

Bottom line: A compact smart LG window unit for small rooms.

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No. 10Best simple small-room unit

LG LW5025R 5,000 BTU

Type
Window
Rated cooling
5,000 BTU
Room size
Up to 150 sq ft
Rated noise
Not listed
ENERGY STAR
Not listed

This model states 5,000 BTU and 150 square feet of coverage with a 50 db noise figure and easy install feature. It ranks below the LG LW6024RSMX 6,000 BTU because it does not list Wi-Fi and cools a smaller area. It closes the list with the lightest listed weight of the picks, 34 pounds.

Why it made the list

  • 5,000 BTU with 150 square feet stated coverage
  • 50 db noise figure
  • 34 pounds, very light
  • Easy install and multiple fan speeds

Trade-offs

  • Wi-Fi or app control not stated by the maker
  • No inverter compressor listed
  • ENERGY STAR certification not listed

Good fit if

  • Very small rooms around 150 square feet
  • Users who want a basic, lightweight window unit

Skip if

  • You need app or voice control
  • You need to cool a room larger than 150 square feet

Bottom line: The simplest lightweight LG window unit for small spaces.

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No. 11Best LG portable pick

LG Smart 10,000 BTU Portable

Type
Portable
Rated cooling
6,000 BTU SACC
Room size
Up to 250 sq ft
Rated noise
Not listed
ENERGY STAR
Not listed

This portable unit states a seasonally adjusted cooling capacity of 6,000 BTU and 250 square feet of coverage. It ranks after the window units because portables are rated on a different capacity figure. Compared with the LG LW5025R 5,000 BTU above, it offers portability but lists fewer detailed specifications.

Why it made the list

  • 6,000 SACC figure stated
  • 250 square feet stated coverage
  • Portable type

Trade-offs

  • No wattage or weight stated
  • No noise figure stated

Good fit if

  • Small rooms around 250 square feet
  • Spaces where a window unit cannot be installed

Skip if

  • You need a window unit
  • You need detailed specs like noise or wattage

Bottom line: The only LG portable pick, rated on its SACC figure.

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How we picked

We ranked LG window units on their stated BTU cooling capacity and LG portables on their seasonally adjusted cooling capacity figure. Room sizes come from the maker's square footage listing. We compared noise figures, voltage, weight, Wi-Fi, inverter compressors, and ENERGY STAR certification where listed. No unit was handled or measured; every number comes from published specifications.

Window vs Portable: Which LG Fits

LG's window manuals call for a standard single-hung or double-hung window and a secure installation. A portable unit vents its exhaust hose through a window kit and can move between rooms. The two types are rated on different capacity figures, so compare a window unit's BTU with other window units and a portable's SACC with other portables.

For LG portables, compare the seasonally adjusted cooling capacity figure rather than the larger BTU number. That figure comes from the U.S. Department of Energy rating method and reads lower than the older BTU figure on the box. See our portable vs window AC guide for more.

Matching BTU to Room Size

The stated BTU figure tells you how much heat a window unit can remove per hour. LG lists a square footage figure for most window models, which is the simplest starting point. A 5,000 BTU unit suits a room around 150 square feet, while the 14,000 BTU picks list 700 and 800 square feet; the ENERGY STAR chart pairs 14,000 BTU with 550 to 700 square feet. For very large open areas, the 23,500 and 24,500 BTU models state coverage above 1,400 square feet.

Do not oversize a window unit. A unit that is too large cools the air before it removes enough moisture, leaving the room feeling clammy. Use the maker's square footage figure and adjust for very sunny rooms or kitchens. Our choosing BTU for room size guide explains the adjustments.

Noise and Inverter Compressors

LG's inverter models, such as the LG Dual Inverter ThinQ 14,000 BTU Window and the LG Dual Inverter 23,500 BTU, list a 44 db noise figure. The LG 24,500 BTU, which lists no inverter compressor, lists 61 db. A lower figure means less sound in the room, which matters for bedrooms and offices. Inverter compressors also vary speed instead of cycling fully on and off, which helps hold a steadier temperature.

If quiet operation is a priority, look for an inverter compressor and a noise figure around 44 to 50 db. The inverter vs fixed-speed compressors guide explains why inverter models tend to run quieter.

Smart Features and Wi-Fi

Most window picks here list Wi-Fi and app control, and several also list voice control. This lets you schedule cooling, change settings remotely, and turn the unit off when you are away. Models like the LG LW6024RSMX 6,000 BTU bring app control to a small room, while the LG LW5025R 5,000 BTU keeps controls simple with a remote and touch panel.

Wi-Fi is convenient but not required for cooling. If you prefer a basic unit, the LG LW5025R 5,000 BTU lists multiple cooling and fan speeds and a dust filter. See our Wi-Fi room ACs and their apps guide for more.

Related: Best Midea Air Conditioner: Midea AC Reviews by Spec · Best Frigidaire Air Conditioner: Frigidaire AC Reviews · Best Black and Decker Portable Air Conditioner: Reviews

Questions people ask

How do you choose the right size LG air conditioner?

Start with the maker's stated square footage figure. For window units, the LG picks list 5,000 BTU for about 150 square feet, 8,000 BTU for 350 square feet, 12,000 BTU for 550 square feet, and 14,000 BTU for 700 or 800 square feet, while the ENERGY STAR chart pairs 14,000 BTU with 550 to 700 square feet. For portables, use the seasonally adjusted cooling capacity figure, not the larger BTU number.

What is the difference between BTU and SACC on LG portables?

BTU is the raw cooling capacity the maker states, while seasonally adjusted cooling capacity (SACC) is the U.S. Department of Energy figure for portables, and it reads lower than the older BTU figure on the box. Compare LG portables on SACC, not BTU. When a portable's maker does not list a SACC figure, its BTU figure cannot be compared with another portable's SACC.

Do LG window units need a special outlet?

The LG picks up to 14,000 BTU list 115 volts. The 23,500 and 24,500 BTU picks list 230 volts. Check the voltage in the specs and the owner's manual for the exact requirements before purchase.

Are LG inverter air conditioners quieter?

Several LG inverter picks list 44 db, while the LG 24,500 BTU, which lists no inverter compressor, lists 61 db; the LG LW1522FVSM 14,000 BTU is an inverter model that lists 53 db. ENERGY STAR says variable speed compressors adjust their speed to control the temperature continuously and can cool the room more quietly.

Sources

Last updated November 6, 2026