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Appliances
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3.2 | 14 Reviews

18,000 BTU Smart Wi-Fi Enabled Window Air Conditioner

LG LW1821ERSM

Features

  • Cooling: 18,000 BTU
  • Estimated Cooling Area: 1,000 Sq. Ft.
  • LG ThinQ® Technology
  • 3 Cooling and 3 Fan Speeds With Auto Cool

Quick Specs

  • Type: Air Conditioner
  • Style: Window/wall Air Conditioner
  • Width: 25.98"
  • Height: 17.68"
  • Depth: 28.11"
  • Energy Star Rated: No
  • Cooling Power: 18000 BTUs

See More

 

Features

  • Cooling: 18,000 BTU
  • Estimated Cooling Area: 1,000 Sq. Ft.
  • LG ThinQ® Technology
  • 3 Cooling and 3 Fan Speeds With Auto Cool
  • Easy to use Electronic Controls
  • Automatically Restarts After Power Failure
COMPONENTS
Cord Length 52"
DIMENSIONS/WEIGHT
Fits Windows 29"-41" W x 19" H
Net Weight (lbs.) 130 lbs
Pallet Qty 3
Product Depth 28.11"
Product Height 17.68"
Product Width 25.98"
Shipping Depth 30.51"
Shipping Height 22.44"
Shipping Weight (lbs.) 145 lbs
Shipping Width 29.13"
Stuffing Quantity (20ft/40ft/40ft High) 135/300/300
TL QTY Floor Loaded 240
TL QTY w/ Pallets 90
ELECTRICAL RATINGS
Plug Type 208/230/15 Amp
Rated Amps (Cooling) 7.5/6.9
Voltage / 60 Hz 208/230V
Watts (Cooling) 1, 470/1, 510
FEATURES
Air Deflection 4-Way
Air Discharge Type Top Discharge
Auto Restart Yes
Chassis Type Slide In-Out
Energy Saver Function Yes
Fan Speed Heating 3
Fan Speed Only 3
Filter Alarm Function Yes
Indoor Fan Type Turbo
Outdoor Vent / Exhaust Yes
Remote Control Yes
Thermostat Control Thermistor
Timer 24 Hr, On/Off
Wi-Fi Connection Yes
PERFORMANCE
BTU Performance 18, 000
BTU performance (Cooling) 17,500/18,000
CEER 11.8/11.8
dBA Level (High/Mid/Low/Sleep) 65/63/61
Dehumid. (Pts/Hr) 4.9
Dry Air Flow (CFM) 530
EER 11.9
Est. Cooling Area (Sq. Ft.) 1000
SUMMARY
Air Type Cooling
Type Window Air Conditioner
UPC CODES
UPC 048231605052
WARRANTY
Parts & Labor 1 Year
AIR CONDITIONER THINQ® SMART FEATURES
ThinQ® Smart Technology Yes

Quick Specs


  • Appearance

  • Type: Air Conditioner
  • Style: Window/wall Air Conditioner

  • Dimensions

  • Width: 25.98"
  • Height: 17.68"
  • Depth: 28.11"

  • Features

  • Energy Star Rated: No

  • Cooling Capacity

  • Cooling Power: 18000 BTUs

Specifications Sheet

Energy Guide

Owner's Manual English 6,066K 10/24/2023

Owner's Manual Spanish 6,079K 10/24/2023

Get Adobe Reader

* Documents require Adobe Reader.

Professional delivery and installation is available for every product we sell. We would be happy to coordinate delivery and installation for you.

Extended warranties are usually very inexpensive and can save you thousands in the future. Some can even cover extra costs that result, such as cost of food that spoils when your fridge dies. It's simple and inexpensive to purchase extended warranties and one of the smartest ways to protect your investment.

Appliances can be large, heavy and expensive. You probably don't have the special tools or expertise needed to fix them in a crisis. If you can spare a few thousand dollars without batting an eyelash for new appliances should they break tomorrow, don't buy a warranty. But if you're like most of us, protect yourself by purchasing inexpensive extended warranties when you buy a new product and save yourself big money in the long run.

3.2 out of 5

57% of reviewers recommend this product.

4 Stars

Cools as expected

Jhco 9/24/2023

I had this unit about a month am well satisfied with it.
Originally posted on lg.com

Yes, I recommend this product

4 Stars

Cools Beautifully

Lyn74 9/13/2023

We purchased this air conditioner couple of weeks ago. It is Big and beautiful. It cools beautifully but one of the faults I have is the snapping sounds it makes when it kicks in and out constantly. It is in our living room where we both sit and it constantly clicks and clicks. The second fault is I cannot adjust the vents. I originally got them to point up but I cannot move them down Im afraid they will break theyre that tight. Otherwise its great.
Originally posted on lg.com

Yes, I recommend this product

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5 Stars

I love the control anywhere features

Demon56 9/7/2023

Its been nearly a month since I got my 18000 btu AC and this beast will freeze you I love it
Originally posted on lg.com

Yes, I recommend this product

 Incentivized Review

5 Stars

Good service

Jhco 8/25/2023

Work good after two weeks use a little louder than the previous units
Originally posted on lg.com

Yes, I recommend this product

 Incentivized Review

3 Stars

an exact fit

Girl from Ipanema 8/15/2023

This unit is quiet and cools one room to cold and doesnt distribute the cool air like my previous unit. The energy efficient newer units are not cooling efficiently unfortunately
Originally posted on lg.com

No, I do not recommend this product

 Incentivized Review

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5 Stars

Everything I expected

EisenBison 6/17/2023

I purchased this using it to cool a walk-in cooler for our vegetable production. Since installing it I havent had to worry about vegetables spoiling in the summer heat one bit. The AC unit runs quietly and efficiently and Im always surprized at how cool the cooler is
Originally posted on lg.com

Yes, I recommend this product

 Incentivized Review

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1 Stars

Defunct unit and no response from customer service

Returning unit 5/24/2023

Bought the unit and had my contractor install it. The unit turns on and the fan works but when the compressor kicks on it immediately shuts down with a strange noise. Have been waiting 20 days after 2 contact attempts for a service repair. I will now return it to the store and get another brand.
Originally posted on lg.com

No, I do not recommend this product

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5 Stars

New LG 18000 btu

Lynnjoe 8/21/2022

We are so extremely happy about our new LG air conditioner...its so great to have it come on and off when house is satisfied and for the first time my electric bill was lower Also very quiet...great product
Originally posted on lg.com

Yes, I recommend this product

 Incentivized Review

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4 Stars

So far so good

ken 44 8/11/2022

Been about 3 weeks seems to be ok except seems rather loud
Originally posted on lg.com

Yes, I recommend this product

 Incentivized Review

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1 Stars

Product was not working

VAWI 8/10/2022

I purchased the air conditioner 2 weeks ago. Has not worked from day one. Have not been able to get any service on the air conditioner
Originally posted on lg.com

No, I do not recommend this product

 Incentivized Review

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1 Stars

Used for years Good A/Cs Warranty coverage sucks

Phillip Hemphill 8/3/2022

Installed a new out of the box LW1821ERSM and it stopped running within 24 hours. Electronics in cover defective. Tested with cover from another new unit and ran perfectly. Have now been in a que for warranty service for almost a month. Have used LG window units for over a decade in 25 residential units and have had warranty problems before. I am not very encouraged based on past experience.
Originally posted on lg.com

No, I do not recommend this product

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5 Stars

Very Reliable

Kkgotcha 7/18/2022

Due to a house fire i was unable to use the air conditioner when I purchased it. Almost 1 year later I finally got to install it in the house I am renting until my home is ready to move back in to. I am so Extremely Happy with the unit It works like a charm From one end of the house to the other is nice and cool which is important since it is 90 degrees outside. The installation and programming are so easy. I misplaced the instruction book but found it online which is fantastic Now I will install a window in my remodeled home just to house my air conditioner because it has become a very important part of my life. I could not function without it. It is one of the best decisions I have made and the price is right too
Originally posted on lg.com

Yes, I recommend this product

 Incentivized Review

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1 Stars

LG Air conditioner wall mounted

Jf425 7/17/2022

I bought this in October 2021. It was professionally installed and worked when installed including with the remote control. The following spring it would never power on. It has never worked again. I have been trying since June 1 2022 to get the warranty covered.
Originally posted on lg.com

No, I do not recommend this product

 Incentivized Review

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1 Stars

Horrible. stopped working after 1 power up

Rs1213 7/16/2022

Brought this unit and was excited to finally cool down my house. After install the unit turned on once and then never again. Calling the tech line was horrible since it is out of the country and they are just reading how to troubleshoot from a book. Noone local to come out to repair so after someone calling from Florida I am in N.Y. they send me a power supply to install myself which didnt fix the problem. After going back and forth through text they finally offer a refund which I have not received yet. Went with another brand and was 1000 percent satisfied.no.more LG products for me
Originally posted on lg.com

No, I do not recommend this product

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