LG 12,000 BTU Air Conditioners: Which One Suits Your Space?
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LG has built a strong reputation in window air conditioners by pairing solid cooling power with easy controls, and its 12,000 BTU class is where many households land when a single bedroom unit is no longer enough. BTU stands for British Thermal Unit, a measure of how much heat an air conditioner can pull out of a room each hour. At roughly 12,000 BTU, LG rates these units for rooms of about 550 square feet, which is close to a 22 by 25 foot living room or a large open-plan space.
The six models below all sit in that same size bracket, but they differ in three ways that matter to a first-time buyer: whether they connect to WiFi, whether they use LG’s quieter dual inverter compressor, and whether they add supplemental heat and need a 230-volt outlet instead of a standard household plug.
LG 12,000 BTU Window Air Conditioners Compared
LG
LG 12,000 BTU Window AC, Dual Inverter, WiFi & Remote, Voice Control,White
Price and specifications are read from the Amazon product page and can change.
LG 12,000 BTU Window AC
Best for: Light sleepers and energy-conscious buyers
Pros
- Dual inverter compressor
- As low as 44 dB in sleep mode
- 4 cooling and fan speeds
- WiFi and voice control
Cons
- Listing does not give window size range
Best for: Simple remote control, no app needed
Pros
- 3 cooling and fan speeds
- 24-hour timer
- Auto restart after outages
Cons
- No WiFi or app control
| Model | Cooling Power and Room Size | WiFi Control | Listed Noise | Voltage |
|---|---|---|---|---|
| LG 12000 BTU Window Air Conditioner (LW1224RSMX) | 12,000 BTU, up to 550 sq ft | Yes, ThinQ, Alexa, Google | 53 dB | 115V |
| LG Smart Window Air Conditioner LW1223ERSM (Renewed) | 12,000 BTU, up to 550 sq ft | Yes, ThinQ, Alexa, Google | 64 dB | 115V |
| LG 12,000 BTU Window Air Conditioner (LW1224RD) | 12,000 BTU, up to 550 sq ft | Not listed | 53 dB (low mode) | 115V |
| LG 12,000 BTU Window AC (LW1224IVSM, Dual Inverter) | 12,000 BTU, up to 550 sq ft | Yes, ThinQ, Alexa, Google | 44 dB (sleep mode) | 115V |
| LG LW1223HR 12200 BTU Window Air (LW1223HRSM) | 12,200 BTU, up to 570 sq ft, with heat | Yes, ThinQ | 58 dB | 230V |
| LG 12,200 BTU Window Air Conditioner (LW1223HR) | 12,200 BTU, up to 570 sq ft, with heat | Not listed | 50-51 dB | 230/208V |
LG 12000 BTU Window Air Conditioner for Smart Home Beginners
![LG 12000 BTU Window Air Conditioner [2024 New]Remote Control WiFi Enabled Works w/LG ThinQ, Alexa, Hey Google,Ultra-Quiet, Washable Filter, Cools Large Rooms up to 550Sq.Ft AC Unit White LW1224RSMX](https://m.media-amazon.com/images/I/41f1+w1mDrL._SL520_.jpg)
LG
LG 12000 BTU Window Air Conditioner [2024 New]Remote Control WiFi Enabled Works w/LG ThinQ, Alexa, Hey Google,Ultra-Quiet, Washable Filter, Cools Large Rooms up to 550Sq.Ft AC Unit White LW1224RSMX
Price and specifications are read from the Amazon product page and can change.
LG 12000 BTU Window Air Conditioner
Best for: Smart control in a large room
Pros
- WiFi with ThinQ, Alexa and Google
- Cools up to 550 sq ft
- Slide-out washable filter
- EZ Mount kit included
Cons
- No inverter compressor
- 53 dB is not the quietest here
The LG 12000 BTU Window Air Conditioner (model LW1224RSMX) is a WiFi-enabled unit rated to cool up to 550 square feet. Through the LG ThinQ app you can adjust it from your phone, and the listing says it also works with Amazon Alexa and Google Assistant for voice commands. It runs on a standard 115-volt outlet, uses R-32 refrigerant, and is listed at 53 dB. It has a regular rotary compressor rather than an inverter, which simply means the compressor switches on and off to hold the temperature instead of ramping its speed up and down.
Installation is one of its selling points. The listing describes a slide in and out chassis and an included EZ Mount kit for a double-hung window between 27 and 39 inches wide and 16 inches tall. A slide-out washable filter with a check filter alert reminds you to clean it, and LG suggests doing so every 30 days. The description also mentions three cooling and fan speeds and 4-way air deflection to spread air around the room.
This model suits someone who wants app and voice control in a large room without paying attention to extras like heat. If noise is your top worry, the dual inverter model further down is the quieter pick.
LG Smart Window Air Conditioner LW1223ERSM as a Renewed Option
LG
LG Smart Window Air Conditioner LW1223ERSM (Renewed)
Price and specifications are read from the Amazon product page and can change.
LG Smart Window Air Conditioner LW1223ERSM
Best for: Smart features from a renewed unit
Pros
- ThinQ app and voice control
- Energy Star certified
- Timer, sleep mode, auto restart
Cons
- Renewed, not new
- 64 dB listed noise level
The LG Smart Window Air Conditioner LW1223ERSM is sold as a renewed product, and the listing names Amazon Renewed as the brand, so treat it as a refurbished LG unit rather than a new one straight from the factory. The listing does not specify what refurbishment or warranty terms apply, so read the offer details before buying, especially if this is a gift.
On paper it is a capable smart unit: 12,000 BTU for rooms up to 550 square feet, LG ThinQ app control, voice control through Alexa or Google Assistant, multi-direction airflow, an Energy Saver mode, and Energy Star certification. It also lists a timer, sleep mode and auto restart after a power outage. The specs give a SEER rating of 12.1 (a measure of cooling efficiency over a season, where higher is better) and dimensions of 22.3 by 23.6 by 15 inches. One point to note is the listed noise level of 64 dB, noticeably higher than the other models here, and the “capacity: 92 pounds” entry is unclear, since the listing does not say whether that is the unit’s weight.
This renewed model fits a shopper who wants smart features and is comfortable with a refurbished appliance. Buyers who prefer a brand-new unit with the same kind of app control should look at the LW1224RSMX above.
LG 12,000 BTU Window Air Conditioner for Simple, No-App Cooling
The LG 12,000 BTU Window Air Conditioner (model LW1224RD) keeps things straightforward. It cools up to 550 square feet, around a 22 by 25 foot room, with electronic controls on the unit and a remote. The listing names three cooling and fan speeds, an Auto Cool mode, a 24-hour timer, 4-way air deflection and auto restart after a power failure. It runs as quietly as 53 dB on low and plugs into a 115-volt outlet.
The listing does not mention WiFi, an app or voice assistants, so plan on using the remote. The specification sheet names a scroll compressor and no inverter, and the filter is washable.
This is a good choice for grandparents, renters or anyone who simply wants a reliable remote-controlled unit without setting up an app. If you like the idea of turning the air on before you get home, one of the WiFi models is the better match.
LG 12,000 BTU Window AC with Dual Inverter for Quiet Rooms
The LG 12,000 BTU Window AC (model LW1224IVSM) is the only unit in this group with LG’s dual inverter compressor. An inverter compressor adjusts its speed to hold the temperature steady rather than switching fully on and off, which is why these units tend to run more quietly and use less energy. LG lists this model as low as 44 dB in sleep mode and states it is up to 35 percent more energy efficient than the Energy Star requirement.
It also has the most control options in the lineup: four cooling and fan speeds with Auto Cool, a digital control panel, an LCD remote, a 24-hour timer, LG ThinQ app control and voice control with Alexa and Hey Google. Like the others it covers up to 550 square feet on a 115-volt outlet, uses R-32 refrigerant and has a washable filter with a filter reminder. The listing does not specify the window size range it fits, so measure your window and check the product details.
Light sleepers, people putting a unit in a bedroom or home office, and anyone who runs the air conditioner for long hours will get the most from it. If you also need heat on cool mornings, one of the two 12,200 BTU models is the one to consider instead.
LG LW1223HR 12200 BTU Window Air with Smart Control and Heat
Best for: Smart cooling plus heat, 230V outlet
Pros
- Supplemental heat
- Covers up to 570 sq ft
- ThinQ control named in listing
Cons
- Needs a 230V outlet
- Only 2 fan speeds
The LG LW1223HR 12200 BTU Window Air (listed as LW1223HRSM) adds supplemental heat to cooling. It is rated at 12,200 BTU for rooms up to 570 square feet, about 19 by 30 feet. The listing says LG ThinQ lets you start or stop the unit, change the mode and set the temperature from your phone, and the description adds voice commands. It offers two cooling, heating and fan speeds, a 24-hour timer, a remote, an Energy Saver mode, auto restart and 4-way air deflection.
The important detail for first-time buyers is the 230-volt power requirement. Most ordinary wall outlets in U.S. homes are 115 volts, so this unit needs a dedicated higher-voltage outlet, the kind often installed for larger appliances. Check your outlet before you buy, or ask an electrician. Its listed noise is 58 dB. “Supplemental heat” means it can take the chill off a room on cooler days, not replace a home’s main heating system.
This is the pick for someone who already has a 230-volt outlet in the room and wants both smart control and a little heat. If you have that outlet but do not need an app, the next model covers the same job with fewer extras.
LG 12,200 BTU Window Air Conditioner with Supplemental Heat
Best for: Cool summers, chilly shoulder seasons
Pros
- Supplemental heat
- As low as 50 dB on low
- Slide in-out chassis
Cons
- Needs a 230/208V outlet
- No WiFi listed
The LG 12,200 BTU Window Air Conditioner (model LW1223HR) shares the 12,200 BTU rating, 570 square foot coverage and supplemental heat with the model above, and it also requires a 230/208-volt outlet. Controls are electronic with a remote, and it offers two cooling, heating and fan speeds, a 24-hour timer, 4-way air deflection, auto restart and a slide in-out chassis.
The listing does not mention WiFi or app control. There are also small inconsistencies: the feature list says it runs as low as 50 dB on low, while the specifications say 51 dB, and it lists R-410A refrigerant, while the other LG units here list R-32. Neither changes how you would use it, but it is worth knowing when you compare model numbers.
It suits a household with a 230-volt outlet that wants cool summers and a warmer room in spring and fall, controlled simply by remote. Anyone who wants to control the unit from a phone should choose the LW1223HRSM instead.
How to Choose the Right LG 12,000 BTU Window Air Conditioner
Room size. A 12,000 BTU unit is meant for roughly 550 square feet. Measure length times width of the room. Every model here covers that, and the two 12,200 BTU models stretch to 570 square feet. For a much bigger space, a larger unit such as a 14,000 BTU window AC may be a better fit.
Your outlet. Four models plug into a standard 115-volt outlet. The two heat models need 230 volts, so check the outlet near your window first. This is the single most common mistake first-time buyers make with the heat-and-cool units.
Smart features. If you want phone or voice control, choose the LW1224RSMX, the dual inverter LW1224IVSM, the renewed LW1223ERSM or the LW1223HRSM. The LW1224RD and LW1223HR rely on a remote.
Noise and efficiency. The dual inverter model leads here, listed as low as 44 dB in sleep mode. The renewed LW1223ERSM lists the highest noise at 64 dB. If you are still comparing brands, our guide to another popular 12,000 BTU air conditioner lineup covers similar sizes.
FAQ
What size room does a 12,000 BTU LG air conditioner cool?
LG rates its 12,000 BTU window units for rooms up to 550 square feet, about 22 by 25 feet. The 12,200 BTU heat models are rated up to 570 square feet, about 19 by 30 feet.
Which LG window air conditioner is the quietest?
Among these six, the dual inverter LW1224IVSM lists the lowest sound level, as low as 44 dB in sleep mode. That is well below the 53 dB of the LW1224RSMX and LW1224RD.
Do the LG 12,200 BTU models with heat need a special outlet?
Yes. Both the LW1223HRSM and LW1223HR list a 230-volt requirement, with the LW1223HR noted as 230/208V. They will not plug into a regular 115-volt wall outlet.
Which LG models work with the ThinQ app and voice assistants?
The LW1224RSMX, the renewed LW1223ERSM and the dual inverter LW1224IVSM list ThinQ plus Alexa and Google compatibility. The LW1223HRSM lists ThinQ control. The LW1224RD and LW1223HR listings do not mention WiFi.
Is the renewed LG LW1223ERSM a good gift
It can be, if the recipient is comfortable with a refurbished appliance. Check the listing for condition and warranty details, since the product data here does not spell them out.
What does dual inverter mean on an LG air conditioner?
It describes a compressor that changes speed to hold a steady temperature instead of cycling fully on and off. LG links this to quieter running and states the LW1224IVSM is up to 35 percent more efficient than the Energy Star requirement.
