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LG

LG 18,000 BTU Smart Window Air Conditioner, 230/208V, Cools Room up to 1000 Sq. Ft. for Bedrooms, Living Room, Apartments, with Remote, 3 Fan Speeds, 24-Hour Timer, White

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Availability: Only 2 left in stock, order soon!
Fulfilled by Home supply usa
Arrives Monday, Aug 18
Order within 7 hours and 44 minutes
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Size: 18000 BTU


Style: Wifi & High Efficiency


Color: White


Features

  • Window Air Conditioner with Low Noise Performance: LG window air conditioners operate at sound levels as low as 52dB (in low mode) eliminating unnecessary noise; Get a good night's sleep and work without distraction with this air conditioner window unit
  • Multiple Fan Speeds: 3 cooling and fan speeds with Auto Cool allow you to customize your cooling; Adjust the ac window unit air flow to suit your needs
  • AC Window Unit with Timer: Create your own cooling schedule to save on energy costs with the 24 hour on/off timer
  • Cools Rooms up to 1,000 Square Feet: LW1821ERSM is ideal for cooling large rooms (25' X 40'); With the 1,000 square feet cooling coverage, keep your bedroom, office, or any other large space comfortably cool with this window unit ac

Description

Experience the ultimate in cooling convenience and efficiency with the LG window air conditioner. This smart air conditioner allows you to cool your home from anywhere using LG ThinQ technology, enabling control with your smartphone or through voice commands with Amazon Alexa or Google Assistant. Designed for medium rooms up to 1000 sq. ft., this quiet window AC unit delivers powerful cooling while helping to save on energy consumption. With three cooling and fan speeds, as well as a 24-hour timer, you can easily create a personalized cooling schedule that suits your needs. The 4-way air deflection feature ensures that the airflow can be directed precisely where it's needed, providing optimal comfort whether you're cooling, dehumidifying, or simply circulating the air. In the event of a power outage, the auto restart feature will automatically resume operation once power is restored, eliminating the hassle of manually turning on the unit. The included remote control allows for convenient operation from anywhere in the room, while the easy window installation kit simplifies setup. The slide-out washable filter promotes clean and healthy air circulation, and the check filter alert reminds you when it's time to clean or replace the filter for efficient performance.

Brand: LG


Cooling Power: 18000 British Thermal Units


Special Feature: Window Air Conditioner


Product Dimensions: 25.98"D x 28.11"W x 17.68"H


BEE Star Rating: No


Start year: 2021


Seasonal Energy Efficiency Ratio (SEER): 11.9


Color: White


Voltage: 230 Volts


Refrigerant: R 410A


Product Dimensions: 25.98 x 28.11 x 17.68 inches


Item Weight: 130 pounds


Manufacturer: LG Electronics


Item model number: LW1821ERSM


Form Factor: Window


Warranty Description: 1, Year Limited Warranty


Batteries required: No


Included Components: LW1821ERSM Window Air Conditioner, Window Installation kit, Remote control


Floor Area: 1000 Square Feet


Voltage: 230 Volts


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Aug 18

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Great replacement for Midea U and/or just a new buy - Works great- quiet and efficient
Size: 1 Count (Pack of 1) Style: Wi-Fi Color: Bright White
Have had this unit for a month after the Midea U recall forced a search for a replacement. It is a really good unit and meets my needs in a very hot humid climate for two upstairs rooms with many electronics in the home office/den. It is quite quiet on low and medium fan levels, and somewhat noisy on higher fan speed but have only utilized anything but low after getting the hang of its capabilities. Quick cooling and efficient dehumidification. App interface is good. Recommend this unit and think it will do a great job for you. Installation pretty straight forward and including removal of the old unit this replaced the total time to 'job done' was 1/2 hour about 15 minutes each step. Really like the design and clarity of the instructions. Recommended! ... show more
Reviewed in the United States on July 12, 2025 by M. Miller
    • Excellent value - works great!
Size: 10000 BTU Style: Cool Only 115V Color: White
I needed to replace an old a/c that was larger, heavier, and filled with mildew from being stored in the shed. I have a small home - only 600 sq. feet total, but the main area I need to cool is about half that -- my living/dining area. My previous unit was 15000 BTU, so I was nervous about going with only 10,000....but it cools the area just fine. While the bedroom/bath down the hall doesn't get "chilly", it really never did before, anyway. It does lower the temperature, and then a fan at night suffices for sleeping at that end of the house. The price on this was very reasonable, and when I ask for help to take it in and out, my helpers will be grateful that weighs about HALF what my old one did! It's an attractive unit, easy to pull out and clean the filter, and is fairly quiet. I also love that the remote works so well. I'm very happy with my purchase! ... show more
Reviewed in the United States on July 14, 2025 by presbygirl
    • LG window ac 12k btu.
Size: 12000 BTU Style: Cool Only 115V Color: White
I am a little over a week in to this unit and can't find a single negative thing to say about it Installation was not too difficult because I had a friend help me do the install as it is kind of heavy and bulky, plus I wanted it installed CORRECTLY. I can't get over how quiet this unit is and how well it cooks my retail bait and tackle store. When though it's a smaller, "mom and pop" type place, it cooled the whole shop off to a very comfortable 68 degrees F in about half an hour. The unit completely got rid of 95+% humidity inside the store within 45 minutes and I am very happy with it's ability to keep the place cool, dry, and shit if when it reaches the temp the unit is set at. Overall, I give it 5 stars. I took into account the cost, ease of install, and functionality. It checks every box I listed before making a decision on purchase. Other reviews were very good so I decided to retire my barely functioning 6k but Haier unit and I could not be happier. I will add to this review in a month and then again in, most likely, October. Which is the end of my season and need for the unit because here in NY. The weather tends to be more comfortable and the unit will not be needed. I will add, if you are on the fence between a unit that has less btu's and this one, go with the higher btu unit. It is definitely worth it and for a free extra dollars, you will not be disappointed! Any questions just ask. ... show more
Reviewed in the United States on June 19, 2025 by Susan Surdow
    • This energy saving schemes seems excellent to me
Size: 6000 BTU Style: Electronic & Standard Color: White
I selected buying this 6000 BTU LG for my bedroom after first considered buying another Frigidaire, Haier or a GE air conditioner. I was particularly interested in an a/c unit with low noise, efficient running and of modest cost. Air flow was also important concept. The LG has a 52 decibel rating at low cooling compared to 51 decibel rating for the 6000 Frigidaire; essentially both being quieter than the 6000 Haier and hugely quieter than the 6000 GE. As a frame of reference 50 decibel is equivalent to the sound of high whisper or background sound of the average house. Sixty decibel is the range of typical conversation. Fifty-five decibel was the average decibel level for most window a/c’s in recent past years. To my ears, the fan noise and air turbulence from the output grill of this LG is about the same as the typical window box fan; the compressor over rides that sound mostly because it operates at a bit higher pitch. The Frigidaire seems to have a slightly quieter cooling compressor – but more of a rushing air turbulence from its front discharge grill that tends to offset that benefit. For some, noise is not a major concern as it can even be welcomed in moderation to act as white noise masking unwanted sounds. For me, a/c noise while sleeping can be a bother. However, I have slept very well with this LG while set on its energy saving mode. That setting allows fan to shut off with the cooling compressor – but with fan coming back on in 90 second intervals and running for 30 seconds to sample air temperature until triggered by a rise in temperature to run the compressor. This energy saving schemes seems excellent to me. No noise for a bit at a time and yet the air is kept from overly stagnating. The Frigidaire by contrast runs for 3 minutes after the compressor stops, then waits 10 minutes to run the fan for a super short 10 second span sampling the temperature. In that time span, I often grew a bit uncomfortable with still air becoming warm. The Haier runs 3 minutes like the Frigidaire after compressor stops and waits 10 minutes before recirculates the air for a 3 minute pattern. Both the LG and Frigidaire get extra energy saving by slinging condensation water from the compressor onto the back exchange fins. In heavy rain or high air moisture, the outward fan doing the slinging gets swamped by too much water to plow through, sometimes. This appears to be more a problem with my Frigidaire unit than with my new LG. Simple solution for me is to not use energy saving mode that stalls the fan in spurts from spraying the water over the outside fins – and also avoid using low fan speed. Medium or high fan speed plow through the water build-up well. The LG has a black drain plug on outside right rear. So far in the humid Florida weather, I have had no need to do this, but would simply open and then close the plug when circumstances allowed to return to better energy efficiency. The most pleasant aspect of this LG for me is the uncommon inclined cooling grill.at a 30 degree angle, approximately. While the Frigidaire and Haier have 4-way air direction control neither send cool air to my ceiling were hotter air rises. The LG incline grill sends cooling air that kisses my ceiling. I don’t experience the stratifying pockets of hot air like most other a/c’s leave. The Frigidaire is a solid, well built unit with a very high Consumer Report rating – but its 4-way air control seems to me to direct air flow marginally. I like the appearance of the LG over the Frigidaire or Haier; it resembling the a/c units found under the window and installed in the wall of most upper quality motels. The 6000 LG seems to run about as quite as those units. If you have experienced staying in a motel you’ll have a fairly good idea of the low 52 decibel range of this 6000 LG. . ... show more
Reviewed in the United States on May 17, 2017 by Kindle Customer

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