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LG 18,000 BTU Heat and Cool Window Air Conditioner with Wifi Controls

  • Based on 596 reviews
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Availability: Only 1 left in stock, order soon!
Fulfilled by Electronic Express

Arrives May 26 – Jun 2
Order within 12 hours and 23 minutes
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Size: 18,000 BTU


Style: Wifi 230V


Features

  • Supplemental Heat - For cooler days use the supplemental heat option to add warmth to your space
  • Multiple Fan Speeds - 2 cooling, heating and fan speeds allow you to customize your cooling or heating
  • Auto Restart - After a power failure, Auto Restart will automatically turn the unit back on when power is restored
  • Cools Rooms up to 1,000 Sq. Ft. - LW1821HRSM is ideal for cooling medium rooms (25' X 40')

Description

The LW1821HRSM is the smart way to keep your house feeling comfortable no matter what the weather is like outside! LG ThinQ technology lets you control your air conditioner with your phone or use with Amazon Alexa and Hey Google to have control with the sound of your voice. This unit ideal for cooling medium to large rooms up to 1000 sq. ft. and you can even add a bit of warmth on cooler days with the supplemental heat option. With 2 cooling and fan speeds and a 24 hour timer you can create the perfect cooling schedule. 4-way air deflection lets the flow of air be directed where it's needed most whether cooling, heating, dehumidifying or just circulating air. If there is a power outage, the auto restart feature will automatically turn your unit back on when power is restored. Other features include a remote control, easy window installation kit, removable, washable filter and a check filter alert.

Specs & Other Info

SpecificationDetails
ManufacturerLG Electronics
ModelLW1821HRSM
TypeWindow Air Conditioner
Capacity5.5 Pints
Cooling and Heating Power18000 BTUs
FunctionsCooling, Heating, Dehumidifying
Special FeaturesRemote Control, WiFi Connectivity, Filter Reminder, Dual Functionality
Dimensions30.5"D x 25.5"W x 16.84"H
Energy EfficiencySEER 11.1, Not Energy Star Rated
ColorWhite
Voltage230 Volts
Noise Level57 dB
Weight126.5 pounds
OriginThailand
Surface CoverageUp to 1000 Sq Ft
FinishMatte
Warranty1-Year Limited
Accessories IncludedInstallation Kit, Remote Control

Frequently asked questions

To connect your LG air conditioner to Wi-Fi, first ensure your Wi-Fi is active and you have the LG ThinQ app downloaded on your smartphone. Power on your air conditioner, then open the app, select 'Add device', and follow the on-screen instructions to connect. Make sure your smartphone is connected to the Wi-Fi network you intend to use for the air conditioner.

Yes, this LG air conditioner is designed with both heating and cooling functions. It can efficiently cool a room during hot weather and provide heat during colder seasons, making it versatile for year-round use.

The LG 18,000 BTU air conditioner is designed with energy efficiency in mind, featuring an Energy Efficiency Ratio (EER) that complies with environmental and energy-saving standards. While specific EER may vary by model, it generally offers cost-effective operation and might be eligible for energy rebates in some areas.

You can control your LG air conditioner using the physical control panel on the unit, the included remote control, or via Wi-Fi using the LG ThinQ app. With the app, you can adjust temperature settings, modes, and schedules from anywhere, as long as you have an internet connection.

Top Amazon Reviews

🚀 Abunda's Overview

This is our summary and key points to consider based on customer reviews.


The reviewed air conditioning and heating unit receives high praise for its efficiency, easy installation, and performance in both heating and cooling spaces, making it a versatile solution for various seasons and needs. Customers have successfully used it in different settings, including homes without traditional heating or insulation, garages, and rooms not served by central heating and air. It efficiently heats and cools spaces while being energy-conscious, leveraging solar energy or generators for some users.

Pros

  • 💡 No assembly required and easy to install
  • 🌡️ Efficiently heats and cools, suitable for spaces up to 400 sq ft
  • ⚡ Low energy consumption, compatible with solar power and generators
  • 🔊 Quieter operation than expected, with a SM bonus for quietness
  • 💰 Under $500, making it an economically sound choice

Cons

  • 🌙 Heating performance might not meet expectations for all users
  • 🔧 Potential issues with warranty or replacement for business use
  • 📏 Certain models may require larger window sizes for installation

Should I Buy It?

If you're seeking a versatile, energy-efficient solution for both heating and cooling that's easy to install and operate, this product is an excellent choice. With its overall positive reviews, capability to work in different settings, and environmental considerations, it appears to be a worthy investment for those looking to enhance their comfort affordably. However, if you require robust heating in extremely cold conditions, you may want to assess its performance further or explore additional heating supplements.


  • After 3 decades this stopped my propane for heating!
Size: 8,000 BTU Style: Electronic 115V
The media could not be loaded. No assembly required btw This is a A+++ ccu unit I call it . Climate control unit. Because In a few minutes you can easily go from heating to air conditioning back to heating in moments again . Isn’t new technology as a kid I lived with a heat pump but that was thousands included in house payments . So this absolutely makes a home of recommendation 350 sq feet totally comfortable in moments. I’ve been looking for anything but propane to heat and going back to the grid isn’t in my plans ever so this fit the situation. Only using 1280 watts of continuous usage is outstanding! Not running heat side from Solar today and don’t foresee it but works fantastically with my 1600 watt generator. Saved propane most likely will cover extra fuel used for generation but no electric bills is my main goal . Not going un noticed btw Last visit from them three days ago rechecked the line They don’t understand the outstanding efficiency of this new found treasure , I dreamed about turning this sorta air conditioner around as a kid so seeing it happen I had to save the under 500$ and buy it and so glad I did wow . I have a situation going on here whereas my neighbors have been really polluting my air so with propane had to have ventilation and loss efficiency and never was a fan of the gas fumes . Again with this new ccu I don’t have to do it’s recycling air saved us from the ongoing air assault's. So win win win Another good discovery this air conditioning side uses 575 watts same as the unit I replaced but this is 50% higher cooling capacity yet uses same wattage so was delighted it runs off my Solar in perfect conditions while suns out between 11/4 most of the year in Florida off the grid btw! Why they are not happy lol But nothing but good things so far One noteworthy issue I learned with using a parallel system with Solar was that the wires must be a sizable distance between power sources because just the magnetic sine waves can Interrupt the generator and cause a glitch which a kilowatt meter picked up with flashing screen indicating a issue with power source so keep in mind to use conduit and properly space opposing power supplies . So to review ac side uses 575 watts Easy to run off the sun in perfect conditions 1280 heat pump side that I don’t see Solar powering overnight unless you’ve built a massive battery bank see a electrician or get a backup generator as I wrote about in my book Solar Independent Utility Systems Manual So conclusion far better than burning anything for heat only thing that would beat this is a properly sized radiant heating system that uses the suns heat alongside its photovoltaic advantages. My next goal with geothermal alongside to replace this but until that dream happens This is my answer for the foreseeable future Can’t say enough about this outstanding ccu No more propane tanks running out No more feeding wood fires Now just time the generator usually five to eight hours depending on your temp setting. Set it to max 86 Max cool 61 makes working much harder far safer Thank you LG You hit this one out of the park Pure awesomeness Quietness a BONUS !!!! ... show more
Reviewed in the United States on November 6, 2023 by Kyle William Loshure

  • So far, so good!
Size: 7500 BTU Style: Wifi 115V
I installed in through the wall (stucco) in my garage and it worked very well. It is cooling 400 sq ft with no problem. The heating is not that good though.
Reviewed in the United States on July 29, 2023 by dazfa dazfa

  • Great product
Size: 8,000 BTU Style: Electronic 115V
Great product cools and warms my room comfortable.Great price 😊
Reviewed in the United States on February 24, 2024 by John Broussard

  • Good but initially sucked to install
Size: 7500 BTU Style: Wifi 115V
We just got this in and as some other reviews alluded to, this unit is SUPER cheaply made. We had a horribly hard time getting the inside out from the cabinet because of a manufacturing issue on the back of the unit. Once we got it out, all our effort in removing it from the cabinet completely shredded the padding inside the cabinet. I then began to add the black clip on feet to the unit.. and guess what. one went in and the other broke in multiple pieces. We have not even finished setting it up yet either!!! We need to use the unit so will keep it, but be warned... The price is probably for the wifi and nothing else.. huge upsell and may not worth it! NOTE if the power goes out you may have to manually start thr wifi again, it was not automatic for us and their is a certain button combination to push to re enable wifi... which I had to guess because I could not find it in the manual! ... show more
Reviewed in the United States on September 3, 2022 by Anton & Kayle M

  • Heat and Cool
Size: 8,000 BTU Style: Electronic 115V
Once we got the unit installed and turned it on we were ready for some cooling. We were not disappointed. The unit puts out a welcome stream of cold air!
Reviewed in the United States on May 4, 2024 by Bag ‘em Danno

  • Very loud and Noisy
Size: 18,000 BTU Style: Wifi 230V
I am extremely disappointed in this LG air conditioner. It is extremely loud and noisy. It only has 2 fan speeds. this is a disgrace for an 18,000 BTU air conditioner. I bought this because I live in an apartment that has no thermostat to control the heat level. I have 3 tower heaters used in both bedrooms and my living room. This unit also is a 12,000 heater. I thought that this would be good for my living room, dining room, kitchen and hall way. I ordered this to replace my 16,000 Frigidaire which died. it Lasted 12 years. My air conditioner is installed in a through the wall sleeve. Because of this and the weight of the unit I'm stuck with it. It is too heavy and box to return. other wise I would. Don't make my mistake. LG makes great TV's, but not great air conditioners. Buy another brand that has made air conditioners for years. ... show more
Reviewed in the United States on August 30, 2023 by baba181021

  • Works great
Size: 8,000 BTU Style: Electronic 115V
Had a difficult time finding one locally with the heat feature on it. Found this on Amazon for a good price and delivered to my doorstep. What a deal? Will be buying a second one.
Reviewed in the United States on September 27, 2023 by Larry P

  • Window air conditioner for apartment
Size: 18,000 BTU Style: Wifi 230V
This air conditioner works great. It cools and heats our studio apartment. The remote control is easy to use.
Reviewed in the United States on September 15, 2023 by Amazon Customer

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