18,000 BTU Window Air Conditioner
  • Remote included
  • 4-way Air Direction
  • 3 Cooling & Fan Speeds with Auto Cool
  • Timer
  • Slide-out washable filter
18,000 BTU Window Air Conditioner
$ 589.99
Where to Buy
Energy Guide Label*1

Energy Guide Label*

Estimated yearly energy cost is $148**. Your exact costs will depend on use, local utility rates and the type and source of your energy.
*The Energy Guide label estimates how much energy the appliance uses, compares energy use of similar products, and lists approximate annual operating costs.
**The estimated annual energy cost is based on a national average electricity cost of 13 cents per kWh and seasonal use of 8 hours a day over a 3-month period. Your exact costs will depend on local utility rates and the type and source of your energy.
Match Room Size to BTUs/hr1

Match Room Size to BTUs/hr

Picking the right home air conditioner is very easy with the right information. Before buying an air conditioner, find out how many BTUs you need.
Installation Kit1

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 Reminder1

Filter Check Reminder

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

Washable Filter1

Washable Filter

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

24-hour On/Off Timer1

24-hour On/Off Timer

Up to 24 hours of operation time can be set, so that your air conditioner turns off when you plan it to.

Multiple Fan Speed1

Multiple Fan Speed

Low, Mid, or High 3-way adjustment.

Auto Restart1

Auto Restart

If the power cuts off, your unit resume its previous operation shortly after the power is restored.


  • Cooling BTU Performance
    Est. Cooling Area (Sq. Ft.)
  • CEER
    Dehumidification (Pts/hr)
  • Noise Indoor dB (A) (High/Mid/Low)
    Noise Outdoor dB (A) (High)
  • Dry Air Flow (CFM)


  • Shipping Dimension (WxHxD)
    29 1/7 x 22 4/9 x 30 1/2 inch
    Product Dimension (WxHxD)
    26 x 17 2/3 x 28 1/9 inch
  • Net Weight (lb)
    Shipping Weight (lb)


  • Fan Speed Cooling
    Fan Speed Only
  • Indoor Fan Type
    Air Deflection
  • Energy Saver Function
    Thermostat Control
  • Remote Control
  • Air Discharge Type
    Top Discharge
    Chassis Type
    Slide In-Out
  • Auto Restart
    Outdoor Vent / Exhaust
  • Timer
    24 Hr, On/Off
    Filter Alarm Function


  • Voltage / 60 Hz
    208/230 V
    Cooling Power (W)
  • Cooling Current (A)


  • Color
    Installation Kit
  • Air Filter


  • Parts & Labor
    1 Year Parts and Labor


  • UPC
What people are saying
Rated 5 out of 5 by from Best Air Conditioners LG has ever made! I bought this & so glad I did for its the best LG has ever made. I have LG Air Conditioners for over 20 years.
Date published: 2019-09-20
Rated 4 out of 5 by from Very Good Product I choose this air conditioner for a couple of reasons. I needed something large enough to cool 500 sq. feet in a west faceing house in the deep south. I also was replacing an air conditioner on a 230V system and didn't want to rewire. I have had it for three months during the heart of a very hot summer. It has done an excellent job of cooling. It is Energy Star complient and getting my first bill after a full month of use was a pleasent surprise. It came up short of five stars for two reasons. One, it's noisy. You can expect that from large air conditioners, and after a month of constant use, it quietened noticeably. Either that or I got used to it. Second, it is BIG and heavy. I live in an old house and my window sash wasn't at all happy trying to support that much weight. I strongly suggest extra support unless you have really strong windows. All things considered, expecially cooling and energy use, I highly recommend this product.
Date published: 2019-09-08
Rated 4 out of 5 by from Good unit So far this air conditioner has functioned very well and I consider it to be slightly better than the previous unit which was also a LG product. The new unit has slightly higher noise and vibration levels, but it is also slightly larger and hopefully it will have the same long reliable life span of the previous LG window unit it has replaced. Sadly the climate controls and cooling modes are the same as the older unit it replaced and they were the source of the few irritations we had with the older LG window air conditioner unit. The energy save feature of "sampling the air by starting the fan" is a source of noise, especially at night and in the case of our partially underground house it actually uses more energy than the air conditioners with "inferior" thermostat designs that do not periodically force air over the temperature sensor. I have no doubt your periodic forced air sampling works well in a standard home, but our partially underground home will often go hours, even on the hottest days before the unit actually needs to turn on the compressors and cool. The constant cycling to "test the air" simply waste energy and worse yet adds unneeded noise to our home, especially at night. As mentioned above the controls and operation modes on this LW1816ER are almost exactly the same as the older LG unit's controls and they have the same problem. You really need to add a few more options to the energy saver mode such as giving the user some way to widen the time intervals between the unit forcing air over it temperature sensor.
Date published: 2019-08-14
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Ask your questions. Share your answers.
Please review the detailed product information and help guides in the
Product Support section for this product prior to posting a question.

Model # LW1816ER great unit. I need to get a replacement air filter for the front. Where can I get one? Thanks, Steve

Asked by: steve7474
Parts and accessories can be obtained through our parts distributor, Encompass Parts. Their contact number, for placing orders and pricing information, is 866-779-7906. You can also use their website, at https://www.encompass.com/ ^CP
Answered by: ChrisPSM
Date published: 2019-09-30

are all your A/C units digital?

Asked by: weesie20
Like all our Air Conditioner units, the LG 18000 BTU Window Air Conditioner, Model # LW1816ER has a Digital LED Display and it can be controlled with a remote control, or with touch buttons arrayed around the display...^IFV
Answered by: Ivanf
Date published: 2019-04-15

Just verifying the plug type of this unit.  Does it plug into the nema 6-15. 15 amp plug?

Asked by: Andy43050
The ENERGY STAR® LG 18,000 BTU 230/208V Window Air Conditioner with Remote, Model # LW1816ER must be plugged into a standard 250 V, 3-wire grounding receptacle rated at 15 amps. ^CP
Answered by: ChrisPSM
Date published: 2019-05-28

Do you have the condenser Fan blade for this unit in stock

Asked by: Bruce 87
Parts and accessories can be obtained through our parts distributor, Encompass Parts. Their contact number, for placing orders and pricing information, is 866-779-7906. You can also use their website, at https://www.encompassparts.com/ ^CP
Answered by: ChrisPSM
Date published: 2017-12-06

does this unit have to go in a window? can it go in a wall?

Asked by: John M Jr
The ENERGY STAR® LG 18000 BTU Window Air Conditioner, Model # LW1816ER requires either a standard single-hung or double-hung window for proper installation. It is designed for installation in standard single-hung/double-hung windows with actual opening widths from 29" to 41". The top and bottom window sashes must open sufficiently to allow a clear vertical opening of 19" from the bottom of the upper sash to the window stool. The louvers on the sides of the cabinet cannot be obstructed or covered in any way and installations including wall sleeves, holes in walls or any other type of installation are not recommended...^IFV
Answered by: LGJoel
Date published: 2017-07-18
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