Model: LW1821HRSM

LG Warranty
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MSRP: $899.00 ?


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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
6 July 2023

I love it. The E-saver function is great. Once I figured out that I could connect to the A/C by WiFi and got it setup, I love it even better. I have it in a sunroom that I don’t need it on all the time, it is great to be able to program it to come on and shut off.

  • +

    Features/Settings, Performance

17 June 2023

I purchased this using it to cool a walk-in cooler for our vegetable production. Since installing it, I haven't had to worry about vegetables spoiling in the summer heat one bit. The AC unit runs quietly and efficiently and I'm always surprized at how cool the cooler is!

  • +

    ease of use, Performance

11 September 2022

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.

  • +

    ease of use, Quality, Style/Design, Performance

6 July 2023

Great cooling in a portable building (not so good insulation) in the West Texas sun! Amazingly quite! After much research I selected this LG unit and I’m sure glad I did. Loaded with features easy to install I am so far 100% satisfied.

  • +


23 August 2023

I’ve had this two weeks now. Temperatures here in east Texas have been 105 to 109 each day. This unit under these adverse conditions has performed flawlessly. I’m impressed so far…. Hope this unit last a long time.

  • +


3 weeks ago

Worked well to start but compressor went out a few weeks ago. Communication between LG authorized technician and LG service department is atrocious. Technician not able to get authorization to fix and I had to file a complaint with LG and am still waiting for the ac/heater to either be fixed or...

13 December 2023

2.5 star. Simply because this ac unit doesn’t do its intended job. The heater went out within a few months on this product. It’s freezing in our home and this is our main source of heat.

20 November 2023

I love this! It is so powerful. So easy to control with your phone which makes it more convenient.

1 November 2023

I brought this air condition 1year 3 month and it's already broke im not satisfied at all

23 October 2023

I bought for a classroom, and it works wonders. Classroom now has air and heat.

  • +

    ease of use, 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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