Search  for anything...
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

  • Based on 17,460 reviews
Condition: New
Checking for the best price...
$603.23 Why this price?
Holiday Deal · 33% off was $899.99

Buy Now, Pay Later

As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: Only 10 left in stock, order soon!
Fulfilled by Fast and Precise by Staples
Arrives Dec 25 – Dec 26
Order within 5 hours and 48 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

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


Capacity: 1.5 Tons


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


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


Capacity: 1.5 Tons


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: Dec 25 – Dec 26

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Compact, quiet, and cools the room
Size: 6000 BTU Style: Electronic & Standard Color: White
Just installed this air conditioner. So far, it's working great. I had to get this model because it required the least window height clearance of any quality conditioner that I can find. My older home has storm windows with high base frames, which are a couple of inches higher than the interior window sill. As a result, I had to raise the height of the interior window sill (3 boards nailed together) nearly 3 inches so that the air conditioner could fit over the storm window base frame. This doesn't leave much clearance room with a double-hung window, and this unit fit...just barely. A few notes: 1. The adhesive strip which applied to the bottom edge of the window is very sticky and very fragile. If you get any bit of it stuck on a fingertip, that part will break off from the main strip. 2. The manual has not been updated to match all features of the unit; e.g., it says that the remote control requires one battery. It requires two. But the main installation instructions of the manual still apply. 3. Make sure that the screws for the side panels are applied so that they're invisible from the inside. 4. The unit no longer comes with a drain . Apparently, newer air conditioner models have dropped this "feature." I'm not worried about this because I live in the relatively non-humid west coast. But if you live in a high-humidity area, you should be sure that the unit tips backward a bit towards the outside so that any excess condensation can drip out the back. 5. The remote control is basic. It would be nicer if it would provide a visual indication of temperature setting, fan setting, etc. 6. My window is about 40 inches wide, which exceeds the 35" expansion of the side panels. I covered the open spaces on each end with a piece of 1" thick Owens-Corning foamular (rigid foam insulation). In fact I filled the entire space between the window frame edge and the air conditioning unit (which completely covers the side panels). Cut the foamular a tiny bit bigger, and you can "force" the foam piece into the space with a little pressure; the foam will thus stay firmly in place and effectively block all the open spaces. If you don't want to buy an entire 4'x8' sheet of the foam, Home Depot sells a 2'x2' square for about $6. If you still have tiny open cracks around the foam, a little piece of masking tape will cover any gaps. 7. With the unit in place, my open lower window almost touches the top of the window frame. This means that there is insufficient room to install the included L-bracket as an added protection to prevent the window from being opened further from the outside (e.g., by an intruder). I simply drilled a hole completely through the front window frame and halfway through the back window frame, and then I pushed a big nail into the hole to prevent movement of the window. 8. Some reviews complained that the unit is too noisy. I, however, feel that it's as quiet as a window unit can possibly be. The compressor makes MUCH less noise than my 14,000 BTU Whynter portable air conditioner, which Good Housekeeping ranked in 2018 as quieter than other units on the market. 9. Outside sounds are now more noticeable when the conditioner is not running. This is unavoidable given since I can no longer close the inside window and the outer storm window. If the sounds of crickets bothers you at night, you're probably out of luck. ... show more
Reviewed in the United States on August 12, 2019 by RAWphotos
    • GREAT FEATURES AND PERFORMANCE, LOW COST TO RUN....
Size: 6000 BTU Style: Electronic & Standard Color: White
Review Image by Hank Hank
Review Image by Hank Hank
Review Image by Hank Hank
Review Image by Hank Hank
Review Image by Hank Hank
Review Image by Hank Hank
Review Image by Hank Hank
Review Image by Hank Hank
Review Image by Hank Hank
Review Image by Hank Hank
ADDED PIX OF WHITE/BLUE FILTER PERFORMANCE. As you can clearly see, the filter did keep the white mesh factory filter and the evaporator coils SPOTLESSLY CLEAN.. The filter was changed after about 3 months.. EDIT: ADDED ENERGY COSTS FROM TAPO UNITS.. REVISED ENERGY COST FOR JULY = $66.67 FOR HOME AIR CONDITIONING. IMPORTANT: After you receive your AC unit, or ANY refrigeration appliance, it is really mandatory to let the unit sit-UPRIGHT, for at least 6-8 hours, preferably overnight, to permit the Freon and oil in the system to settle “down” in the unit BEFORE you turn it on…. During shipping you do NOT know if the unit was transported on its side, or even upside down, otherwise, you WILL risk damaging the compressor…. My first purchase of the LG LW6017R 6000 BTU unit was in June of 2000 which replaced a 17 YO Kelvinator 5000 BTU unit. I installed this in my kitchen window primarily to use as backup air conditioning when a Florida hurricane takes out the power. The 6000 BTU size is easily powered by my iGEN2500 inverter generator which also keeps the refrigerator, (beer), cold when the power dies. Recently, my home central AC died and since my air handler is in the attic – builder’s dumb design – I did not want to put good money after bad and spend THOUSANDS with replacing the AC system with the air handler in the attic. I just bought and installed two additional 6000 BTU units; one in my bedroom and the other in the living room. My bedroom window opening was 46 inches wide and the supplied “accordion” side panels would not extend wide enough to block the sides of the AC unit. For the living room window, I “could” have used the accordion panels, but, I wanted to make the installation more “permanent” and I cut pieces of wood for the side panels for both the bedroom and living room installs with pictures showing the final installation. As the units have a cheap, plastic air filter, I also added cut pieces of the white/blue filter material, WHITE SIDE OUT - air input, (ASIN B0DHNBGSXV), and with using the hook side of adhesive Velcro strips, I was able to use this white/blue filter material to ensure a proper air filtration that will keep the evaporator coils clean. See pix. The bedroom and kitchen units provide COLD air with the units cycling during the day. The thermocouple meter shows a 45.1 degree output air temp with a 28.1 degree temperature differential, which is GREAT. The living room unit cools a larger area and with recent 97 degree Florida HEAT, this unit’s compressor runs most of the day. In 95-97 degree heat, my three day electric cost @ $0.14/KWH, for ALL THREE UNITS, was only ~$6.00 or about $2.00 per day, (BR=$0.42/DAY, KIT=$0.45/DAY, and LR=$1.13/DAY)…. You can’t beat that with a stick ;-) As air conditioning is really mandatory in Florida, I am happy as a cool clam without breaking the bank. The remotes are IR which lets you remotely adjust settings individually where an RF remote would definitely cause problems in adjusting an individual unit’s settings. Overall, with the features and performance of these LG units, I can totally recommend these units for keeping your cool for minimal cost…. ... show more
Reviewed in the United States on May 19, 2025 by Hank Hank

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...