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3.7 | 9 Reviews

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

LG LW1821ERSM

Features

  • Cool down your desired space with this 18,000 BTU Air Conditioner
  • Stay comfortable with this LG Air Conditioner that cools up to 1,000 square feet
  • Control key features of your Wi-Fi enabled air conditioner with the ThinQ app
  • Choose your perfect temp with high, mid and low modes for cooling and fan speed

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

 
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Maximum Cooling

LG Window Air Conditioners provide exceptional cooling power that will keep you and your family cool, comfortable, and in control.

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Made to Perfection

LG Window Air Conditioners add powerful performance and stable durability to perfectly match your window frame.

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Maximum Usability

Operate with LED display and simple selection control panel, up/down temperature adjustments, and fan speed selection, using the full-featured remote without leaving your bed, workspace, or couch.

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3-in-1 Operation

Use cool mode for powerful cooling and dehumidifying on hot days. In fan mode, the fan circulates the air in the room. Dry mode is ideal for damp, rainy days.

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Quiet Operation

LG Window Air Conditioners operate at quiet sound (when in low mode) eliminating unnecessary noise for smooth operation that you'll barely notice.

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Control Your Cool From Anywhere

Control key air conditioner features from your phone or favorite smart speaker with the ThinQ® app.

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Installation Made Easy

This unit comes with our simple and convenient installation kit, so you can set up your air conditioner with ease.

Maximum Cooling LG Window Air Conditioners provide exceptional cooling power that will keep you and your family cool, comfortable, and in control.

Made to Perfection LG Window Air Conditioners add powerful performance and stable durability to perfectly match your window frame.

Maximum Usability Operate with LED display and simple selection control panel, up/down temperature adjustments, and fan speed selection, using the full-featured remote without leaving your bed, workspace, or couch.

3-in-1 Operation Use cool mode for powerful cooling and dehumidifying on hot days. In fan mode, the fan circulates the air in the room. Dry mode is ideal for damp, rainy days.

Quiet Operation LG Window Air Conditioners operate at quiet sound (when in low mode) eliminating unnecessary noise for smooth operation that you'll barely notice.

Control Your Cool From Anywhere Control key air conditioner features from your phone or favorite smart speaker with the ThinQ® app.

Installation Made Easy This unit comes with our simple and convenient installation kit, so you can set up your air conditioner with ease.

Features

  • Cool down your desired space with this 18,000 BTU Air Conditioner
  • Stay comfortable with this LG Air Conditioner that cools up to 1,000 square feet
  • Control key features of your Wi-Fi enabled air conditioner with the ThinQ app
  • Choose your perfect temp with high, mid and low modes for cooling and fan speed
  • Make temperature adjustments and fan speed selection on the easy to use control panel or remote
  • Automatically restarts minutes after power is restored when a power failure occurs
  • Reduce power consumption with the Energy Saver Function
  • 208 /230 Voltage allows for efficient cooling
COMPONENTS
Cord Length 52"
DIMENSIONS/WEIGHT
Fits Windows 29"-41" W x 19" H
Net Weight (lbs.) 130 lbs
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"
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

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.

3.7 out of 5

66% of reviewers recommend this product.

5 Stars

Good Product

Sam90 7/15/2024

I bought it almost a year ago and is still running smoothly.
Originally posted on lg.com

Yes, I recommend this product

1 Stars

Terrible appliances terrible service and no one ca

Crap window unit 7/14/2024

I have furnished my entire house with LG products and I am thoroughly disappointed. My brand new washing machine has a door lock code and its 135 dollars to tell me its a door lock malfunction. My window unit was bought in August 2023. We came home from vacation and it was making a terrible noise. We turned it off when and tried to get an appointment to get a warranty fix and because I the unit was still in the wall I couldnt read the numbers so LG would not schedule an appointment. We pulled it out of the wall and the lady with customer service finally scheduled some one two weeks out. Then the tech canceled the appointment because he didnt have electricity at his house so now we are waiting another week. Maybe he will come maybe he wont. Service and equipment are terrible but no one cares. You got my mom but I assure you you will get no more.
Originally posted on lg.com

No, I do not recommend this product

Features

 

Quality

 

Value

 
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

Features

 

Quality

 

Value

 
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

Features

 

Quality

 

Value

 
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

Features

 

Quality

 

Value

 
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

Features

 

Quality

 

Value