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2.7 | 9 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

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This item has purchase restrictions.

We currently only offer free delivery for purchases within 100 miles of our store. Shipping cost is high.
Questions? Contact us for more information.

 
Maximum Cooling

LG window air conditioners provide exceptional cooling power that will keep you and your family cool comfortable, and in control.


Control Your Cool from Anywhere

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


Quiet Operation

LG window air conditioners operate at sound levels as low as 61dB (when in low mode) eliminating unnecessary noise for smooth operation that you'll barely notice.


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.


Installation Kit

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


Filter Check Reminder

The Clean Filter LED lights up to notify you that the filter needs to be cleaned.


Slide-out Washable Filter

Maintenance is easy: simply remove the filter and wash it.


Made to Perfection

LG window air conditioners add powerful performance and stable durability to perfectly match your window frame.

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
Summary
Type Window Air Conditioner
Air Type Cooling
BTU 18,000
PERFORMANCE
BTU performance (Cooling) 17,500/18,000
EER 11.9
CEER 11.8/11.8
Dehumid. (Pts/Hr) 4.9
Dry Air Flow (CFM) 530
dBA Level (High/Mid/Low/Sleep) 65/63/61
Est. Cooling Area (SQ.FT) 1000
Room Size 25' x 40'
Fits Windows 29'-41" W x 19" H
ELECTRICAL RATINGS
Voltage / 60 Hz 208/230
Plug Type 208/230/15 Amp
Watts (Cooling) 1,470/1,510
Rated Amps (Cooling) 7.5/6.9
FEATURES
Wi-Fi Connection Yes
Thermostat Control Thermistor
Air Diflection 4-Way
Remote Controller Yes
Auto Restart Yes
Energy Saver Function Yes
Timer 24 Hr, On/Off
Filter Alarm Function Yes
Fan Speed: Cooling (Heating) 3
Fan Only 3
In Door Fan Type Turbo
Type Air Discharge Top Discharge
Outdoor Vent / Exhaust Yes
Chassis Type Slide In-Out
DIMENSIONS/WEIGHTS
Product Height 17.68
Product Width 25.98
Product Depth 28.11
Product Weight (lbs.) 130
Shipping Height 22.44
Shipping Width 29.13
Shipping Depth 30.51
Shipping Weight (lbs.) 145
Stuffing Quantity (20ft/40ft/40ft High) 135/300/300
Pallet Qty 3
TL QTY w/Pallets 90
TL QTY Floor Loaded 240
COMPONENTS
Cord Length 52''
LIMITED WARRANTY
Parts & Labor 1 Year
UPC CODES
UPC 048231605052

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

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.

2.7 out of 5

44% of reviewers recommend this product.

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

 
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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Value

 
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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Value

 
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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Quality

 

Value

 
5 Stars

Easy to install and use cools instantly

Gre65gg 6/10/2022

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. Cools several rooms almost instantly. Love the remote control and the thermostat feature. I used to watch the electric meter when the old AC was working and it spun like a meat slicer. Now with the LG it spins much slower. And its very quiet no loud fan no rattles. Highly recommend.
Originally posted on lg.com

Yes, I recommend this product

 Incentivized Review

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Value