Model #LW1821HRSM

LG Warranty
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MSRP: $799.00 ?


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Technical Details

Commercial No
Energy Saver Function Yes
Fan Only 2
Cooling Capacity (BTU) 18000
Heating Capacity (BTU) 12000
Dehumidification 5.5 (pts./hr.)
Auto Restart Yes
Weight 139.70 lbs
Filter Alarm Function Yes


Brand LG
UPC 048231605090
Warranty Info Brand New This product is Brand New with full manufacturer warranty

General Information

Height 16.84"
Depth 30.5"
Width 25.5"


Programmable 24-Hour Timer Yes
Works with Alexa Yes
Works with Google Assistant Yes
Works with SmartThinQ Yes
Works with Brand Specific App Yes
Remote Diagnostics Yes
Remote Control Yes
Wi-Fi Connection Yes
Auto Restart Yes
SmartThinQ Works with Google Assistant/Amazon Alexa Yes
Filter Check Reminder Yes
Washable Filter Yes
Easy Installation and Usage Yes
Quiet Operation Yes
Installation Kit Yes
Energy Saver Mode Yes

Electrical Specifications

Frequency 60 Hz.
Phase 1
Amps 20 Amps
Volts 230/208 Volts


Maximum Air Flow 430 CFM
Adjustable Air Direction Yes
Number of Air Directions 4
Wi-Fi Yes
Smart Appliance Yes
Decibel Rating 61 dBA
Air Filter Included Yes
Filter Type Washable
Vented Outside Yes
Plug Type 6-20P
EER 11.2
CEER 11.1
Programmable Timer Yes
Includes Thermostat No
Cooling Area 1000 sq. ft.
Number of Cooling Speeds 2
Provides Heating Yes
Heat Electric Heat
Wireless Remote Controller Included
Wattage 3670 Watts


UL Yes
Energy Star No


Type Window
Window Type Standard
Window Compatible Yes
Color White
Chassis Type Slide Out
User Reviews
26 July 2022

I bought this unit almost 3 weeks ago after my old unit compressor started going out during 100+ degree weather. It couldn't keep out living room cool at 68. This new bigger unit keeps our living room, dining room & kitchen very comfortable at 75 - 77 with the same 100+ temps outside.

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    ease of use, Quality, Features/Settings, Performance

20 August 2021

LG never fails to impress! Works much better than our old unit and makes my home more comfy when its 90 degrees out

10 June 2022

I bought this as my previous AC unit was showing signs of giving up. The removable casing and the many features made this my choice. Once the lightweight casing was installed, the insides were easy to lift and slide in place. No more wrestling with the entire unit trying to set it up.

  • +

    ease of use, Features/Settings, Performance, Quality

21 April 2022

Delivers excellent airflow. Very pleasing and comfortable product

18 July 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!

  • +

    ease of use, Quality, Style/Design, Features/Settings, Performance

3 weeks ago

We bought this and installed it ourselves. It keeps our 752 sq ft home super cold and has helped immensely with humidity issues as well. Have had some trouble hooking it up to ThinQ, but otherwise it has been a super solid investment so far.

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    ease of use, Quality, Style/Design, Performance

21 August 2022

We are so extremely happy about our new LG air's 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!!

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    ease of use, Quality, Style/Design, Features/Settings, Performance

21 August 2022

I Love my new LG window unit it’s more than I expected.

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    ease of use, Quality, Style/Design, Features/Settings, Performance

18 August 2022

Very happy, easy install , works awesome, get the extended warranty it's worth it !!!!!

  • +

    Quality, Performance

17 August 2022

Bought this for my daughter and is she ever happy! This unit is cooling the entire kitchen and living area in her home! It's easy to operate and she just loves it!

  • +

    ease of use, Quality, Style/Design, Features/Settings, Performance

Product Highlights
  • Cooling Area: 1000 sq. ft.
  • Heat: Electric Heat
  • Decibel Rating: 61 dBA
  • Cooling Capacity (BTU): 18000
  • Heating Capacity (BTU): 12000
  • Number of Cooling Speeds: 2
  • Adjustable Air Direction: Yes
  • Number of Air Directions: 4
  • Plug Type: 6-20P
  • Remote Control
  • WiFi Connect
  • Auto Restart
  • SmartThinQ Works with Google Assistant/Amazon Alexa
In The Box
  • Smart Electric Heat Window Air Conditioner
  • Google Assistant/Amazon Alexa in White
Still Have Questions?
We can help via Live Chat, Email or you can call us 1-888-840-0464


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