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  • Cooling: 18,000 BTU/Heating: 12,000 BTU
  • Estimated Cooling Area 1,000 Sq. Ft
  • Multiple Cooling/Heating Speeds
  • Easy To Use Electronic Controls
  • Window Installation Kit Included
18,000 BTU Window Air Conditioner, Cooling & Heating
$ 689.00

Easy Installation

LG window air conditioners are designed for easy and efficient installation and come with a washable and resusable air filter. Before buying an air conditioners, measure your room to find out how many BTUs you need.

Horizontal Table
Room Size (Sq. Ft.) 150 (10'x15')
BTUs/hr up to 5,000
Room Size (Sq. Ft.) 260 (13'x20')
BTUs/hr 6,000
Room Size (Sq. Ft.) 280 (14'x20')
BTUs/hr 7,000
Room Size (Sq. Ft.) 340 (17'x20')
BTUs/hr 8,000
Room Size (Sq. Ft.) 450 (18'x25')
BTUs/hr 10,000
Room Size (Sq. Ft.) 550 (22'x25")
BTUs/hr 12,000
Room Size (Sq. Ft.) 800 (25'x32')
BTUs/hr 15,000
Room Size (Sq. Ft.) 1,000 (25'x40')
BTUs/hr 18,000
Room Size (Sq. Ft.) 1,300 (33'x40')
BTUs/hr 22,000
Room Size (Sq. Ft.) 1,560 (39'x40')
BTUs/hr 24,000
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.
Slide-out Washable Filter1

Slide-out Washable Filter

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

    Low, or High 2-way adjustment.

  • Auto Restart

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


    • Type
    • Window Air Conditioner
    • BTU
    • 18,000


    • BTU performance (Cooling)
    • 17,500/18,000
    • BTU Performance (Heating)
    • 9,800/12,000
    • EER
    • 11.2
    • CEER
    • 11.1/11.1
    • Dehumidification (Pts/hr)
    • 5.5
    • Dry Air Flow (CFM)
    • 430
    • dBA Level (High/Mid/Low/Sleep)
    • 61/57
    • Est. Cooling Area (SQ.FT)
    • 1000
    • Room Size
    • 25' x 40'
    • Fits Windows
    • 29'-41" W x 18" H


    • Shipping Dimension (WxHxD)
    • 29.38 x 21.19 x 33.00 inch
    • Product Dimension (WxHxD)
    • 25.50 x 16.84 x 30.50 inch
    • Net Weight (lb)
    • 126
    • Shipping Weight (lb)
    • 139


    • Fan Speed Cooling
    • 2
    • Fan Speed Heating
    • 2
    • Fan Speed Only
    • 2
    • Indoor Fan Type
    • Blower
    • Air Deflection
    • 4-Way
    • Energy Saver Function
    • Yes
    • Thermostat Control
    • Thermistor
    • Remote Control
    • Yes
    • Compressor
    • Rotary
    • Air Discharge Type
    • Side Discharge
    • Chassis Type
    • Slide In-Out
    • Auto Restart
    • Yes
    • Outdoor Vent / Exhaust
    • Yes
    • Timer
    • 24 Hr, On/Off
    • Filter Alarm Function
    • Yes


    • Voltage / 60 Hz
    • 208/230 V
    • Cooling Power (W)
    • 1,560/1,600
    • Cooling Current (A)
    • 7.8/7.3
    • Heating Power (W)
    • 3,100/3,670
    • Heating Current (A)
    • 15.0/16.0


    • Color
    • White
    • Installation Kit
    • Yes
    • Air Filter
    • Washable


    • Parts & Labor
    • 1 Year Parts and Labor


    • UPC
    • 048231379526

What people are saying

Rated 4 out of 5 by from replacement AC/heater We had an LG AC/Heater in our living room window. It kept us cool through 5 Florida summers. When the compressor stopped working we tried to have it repaired, but couldn't find anyone who would/could repair a window unit. We bought a new unit that has more BTU's and hopefully it will last longer than 5 years. It is a beautiful unit with an easy to clean the filter. The one problem we have with the unit is how loud it is when running, even on Fan 1. In order to hear the TV we have to turn it off.
Date published: 2022-06-18
Rated 4 out of 5 by from Does the job I use it in my upstairs garage the heating and cooling feature is very convenient this is my second unit thanks
Date published: 2022-04-24
Rated 5 out of 5 by from Awesome product I bought this product in September 2020. And oh my goodness, I love it. I loved it so much I told my daughter about it and she bought one too. It cools my home, and I don’t have to worry when it gets cold. I just turn it to heater mode. I love it so much. Thinking about getting another one for my bedroom.
Date published: 2022-01-11
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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.

What type of bracket to mount in window do you suggest for this unit?

Asked by: Lake11
If your local building codes require you to have a bracket for the LG 18,000 BTU Window Air Conditioner, Cooling & Heating, Model # LW1816HR, you should contact your buildings supervisor or contact your local building inspector to inquire about what type of bracket is permitted...^IFV
Answered by: Ivanf
Date published: 2022-05-10

I'm looking at a new "refurbished" model on a website. Does LG refurbish and does a warranty still apply?

Asked by: bputnam
You will need to contact the retailer that is selling this LG 18,000 BTU Window Air Conditioner, Cooling & Heating, Model # LW1816HR as a refurbished product. The product page for the air conditioner on the website that you see the product advertised should indicate whether it is Manufacture refurbished or Seller refurbished. Not all refurbs are the same. Third-party refurbished products are available. Manufacturer refurbished means it was checked out with any problems corrected by either the maker themselves or a firm contracted by the maker to handle returned merchandise, usually comes with a fresh manufacturer's warranty of some sort. Seller refurbished means the seller fixed any problems themselves...^IFV
Answered by: Ivanf
Date published: 2022-01-14

Freezes up and compressor seems to still run when cut off even on heat mode only 1 yr old. can't find receipt from Home Depot so can't get warranty work done on it filter has been cleaned regular no dirt in cabinet or back side of AC

Asked by: Glen 43
That's not good! We're sorry to see that you've run into these issues with your air conditioner. We'll need to gather some additional details from you in order to see how we can best assist. Please reach out to a specialist via Twitter @LGUSSupport or via Facebook ^CP
Answered by: ChrisPSM
Date published: 2019-11-11

What is the dBA level (indoor/outdoor) mean?

Asked by: Opietaylor23
The dBA Level (Indoor / Outdoor) for the LG 18000 BTU Window Air Conditioner, Cooling & Heating, Model # LW1816HR are what are known as A-weighted decibels. A-weighted decibels abbreviated dBA, or dBa, or dB(a), are an expression of the relative loudness of sounds in air as perceived by the human ear. In the A-weighted system, the decibel values of sounds at low frequencies are reduced, compared with unweighted decibels, in which no correction is made for audio frequency. For example, normal conversation is rated at 60 dBA, so the indoor rating of 61 dBA for this Air Conditioner means that it will be slightly louder indoors as normal conversation. In terms of subjective loudness, a 1 dB change yields just over a 7% change...^IFV
Answered by: Ivanf
Date published: 2019-04-09

Can I mount this through the wall? Or is it intended solely as window unit?

Asked by: FBC_Texas
The LG 18,000 BTU 230/208-Volt Window Air Conditioner with Cool, Heat and Remote, Model # LW1816HR is a window air conditioner and as such, it requires a standard single-hung or double-hung window for proper installation. It cannot be installed in a wall sleeve. ^CP
Answered by: ChrisPSM
Date published: 2021-07-30

What size plug is used? Is it a 110 or 220

Asked by: Justinfehrenbach
The LG 18000 BTU Window Air Conditioner, Cooling & Heating, Model # LW1816HR has a power cord that includes a curent interrupter device that has to be plugged into a standard 250 V, 3-wire grounding receptacle protected by a 20 AMP. time delay fuse of a 20 AMP circuit breaker. The NEMA Conforguration for the plug is 6-20P (ove vertical blade, one horizontal blade and a 'D-shaped' grounding pin...^IFV
Answered by: LGJoel
Date published: 2020-05-08

I plan on placing this unit in a custom AC box, made out of aluminum. How much space is needed around the unit so it doesn't overheat?

Asked by: Geno900
The LW1816HR is designed for installation in standard single-hung or double-hing windows with actual opening widths from 29" to 41". The top and bottom window sash must open sufficiently to allow a clear vertical opening of 18" from the bottom of the upper sash to the window stool. This unit is not designed to be installed in any type of a sleeve or box as that will prevent proper operation and void its warranty. ^AC
Answered by: Amber C
Date published: 2019-09-18

The lever for exhaust-fresh air is a push pull action.  Which position is for no fresh air? 

Asked by: Deputydog
Pull is open and pushed in is closed. ^AC
Answered by: amber
Date published: 2018-01-16
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