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  • 18,000 BTU
  • Estimated Cooling Area 1,000 Sq. Ft
  • Energy Savings up to 25%
  • LoDecibel™ Quiet Operation
  • LG ThinQ® Technology
18,000 BTU DUAL Inverter Smart wi-fi Enabled Window Air Conditioner
$ 629.00
Dual Inverter logo

Efficient, Energy Saving Inverter Technology

LG Window Air Conditioners with DUAL Inverter Compressor™ are up to 25% more energy savings* than the ENERGY STAR® certification requirement. Enjoy LG's innovative Inverter Technology that's both powerful and quiet.
*Inverter Technology is a key attribute of LG’s new room air conditioners. It is used in conjunction with a variable-speed compressor and adjusts the compressor motor speed to regulate temperature. This is more energy efficient than non-Inverter Technology room air conditioners, which turns the compressor either on or off to regulate temperature. In Department of Energy approved testing, LG’s Inverter room air conditioner model (LW1817IVSM) showed a 25% Combined Energy Efficiency Ratio (CEER) positive difference when compared with the ENERGY STAR® minimum CEER requirement.
*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.
*When in sleep mode.
sleep mode icon

Sleep Mode

This mode keeps operating noise to a minimum and turns the air conditioner off after a set time. The timer can be set from 7 to 12 hours.
24-hour On/Off Timer icon

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.

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.
  • Multiple Fan Speed

    Sleep, Low, Mid or High 4-way speed adjustment.

  • Auto Restart

    When power failure occurs, your unit will resume its previous operation minutes after the power is restored.

Warranty / Certifications


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


    • BTU performance (Cooling)
    • 18,000
    • CEER
    • 14.7
    • Dehumidification (Pts/hr)
    • 4.2
    • Dry Air Flow (CFM)
    • 500
    • dBA Level (High/Mid/Low/Sleep)
    • 59/56/53/44
    • Est. Cooling Area (sq. ft.)
    • 1000
    • Room Size
    • 25' x 40'
    • Fits Windows
    • 29'-41" W x 19" H


    • Product Height
    • 17.72"
    • Product Width
    • 25.98"
    • Product Depth
    • 26.22"
    • Product Weight (lbs.)
    • 110.23
    • Shipping Height
    • 24.57"
    • Shipping Width
    • 29 1/8"
    • Shipping Depth
    • 30 7/16"
    • Shipping Weight (lb)
    • 124.34
    • Stuffing Quantity (20ft/40ft/40ft High)
    • 63/144/192
    • Pallet Qty
    • 8
    • TL QTY w/ Pallets
    • 160
    • TL QTY Floor Loaded
    • 240


    • Fan Speed Cooling
    • 4
    • Fan Speed Only
    • 4
    • Indoor Fan Type
    • Turbo
    • Air Deflection
    • 4-Way
    • Energy Saver Function
    • Yes
    • Thermostat Control
    • Thermistor
    • Remote Control
    • LCD
    • Compressor
    • Dual Inverter
    • Air Discharge Type
    • Top Discharge
    • Chassis Type
    • Slide In-Out
    • ThinQ® Technology
    • Yes
    • 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)
    • 1,590/1,590
    • Cooling Current (A)
    • 8.8/7.9


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


    • Parts & Labor
    • 1 Year Parts and Labor


    • UPC
    • 048231600132

What people are saying

Rated 5 out of 5 by from Quiet as a mouse We have had many air conditioners in the past but never an LG. SO SORRY WE WAITED SO LONG. This is the quietest air conditioner on the market
Date published: 2022-08-05
Rated 5 out of 5 by from great machine machine was great and it was insalled correctly. very freindly.
Date published: 2022-08-05
Rated 5 out of 5 by from Since I'm wheelchair bound, my neighbor installed. It installed just in time with the heat wave hitting across the country. The unit has kept our bedroom, as well as the bathroom and kitchen a pleasant and constant 70°. The only problem is I was unable to link my phone to the unit.
Date published: 2022-08-02
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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.

Can this model's case be installed in a Through wall manner? I currently have an old unit and its case is almost the same dimensions. Case has been externally painted to match, any chance you could provide the minimum dimensions required by Inner unit?

Asked by: frovira
The LG 18,000 BTU DUAL Inverter Smart Wi-Fi Enabled Window Air Conditioner, Model # LW1817IVSM has a Slide In-Out Chassis that allows you to slide the unit from its chassis for ease of installation in a standard single-hung or double-hung window. The side and top louvers and all louvers of the cabinet must not be blocked and must remain exposed to the outside of the structure and unobstructed. Restriction of outside air will greatly reduce the cooling efficiency of the air conditioner to cause it to malfunction. Non-window installations, including using sleeves or wall openings, and other installation methods are not recommended...^Ivan
Answered by: Ivanf
Date published: 2021-08-02

I have a 40" wide window, will the side curtains stretch to fit that?

Asked by: serpanterra
Hello Serpanterra. The LG 18,000 BTU DUAL Inverter Smart wi-fi Enabled Window Air Conditioner, Model # LW1817IVSM is designed for installation in standard single or double-hung windows with actual opening widths from 29" to 41". That air conditioner has a width of 25.98" so when it is placed centrally in your 40" opening, you will have openings of 7.01" on either side of the air conditioner. The curtains are designed to cover an opening of 41" which means they will cover up to 7.51" on either side of the air conditioner after installation so they will adequately cover your 40" opening...^IFV
Answered by: Ivanf
Date published: 2021-06-25

Why is It that when my AC is on energy saver it only shuts completely down if the temperature is set above 75. At 75 degrees on energy saver the unit continues to run never shuting off. 

Asked by: Darlene hol
I have the same problem, the temp setting has to be above 76 or 77 for the unit to shut down.
Answered by: Ike2
Date published: 2019-07-29

Help. Have a lg ac inverter.  The control does not communicate with unit.  Have bought three remotes....nothing.  Have also original.  Travel with it to see if anyone would help.  Any good reps in Washington DC metro area?

Asked by: Carl21
Please contact LG Customer Support so that we can better investigate your issues and assist you towards a resolution. You can contact our Customer Support by any of the below options: Phone: 1-800-243-0000 LiveChat: Email: Facebook Messenger: Twitter: @LGUSSupport The LG Community Forum is also a great resource for getting help from other LG customers:
Answered by: ChrisPSM
Date published: 2019-07-15

I am looking for a quiet thru wall unit.does LG make a dual inverter they wall unit or something comparable??

Asked by: Michael z
I just had this model (professionally) recommended and installed by an HVAC company to replace a 40 year old window unit that had been instaled through the wall. In my case, the hole in the wall was already framed out like a window but with no actual window. The framing for it is sturdy and all the grills outside are free and clear. So I suppose you could do it if you have a similar framed out space for it. And it is very quiet.
Answered by: mltmc
Date published: 2019-09-11

What kind of plug is on this unit- a 110 or 220?

Asked by: ADAMAS
The LG 18,000 BTU DUAL Inverter Smart wi-fi Enabled Window Air Conditioner, Model # LW1817IVSM has to be plugged into a standard 240 V, 3-wire grounding receptacle rated at 15 A, 60Hz. The NEMA configuration for the plug is 6-15P (two horizontal blades over a d-shaped grounding pin)...^IFV
Answered by: Ivanf
Date published: 2021-05-30

Can this unit be used as a thru the wall AC.??

Asked by: Michael z
The LG 18,000 BTU DUAL Inverter Smart wi-fi Enabled Window Air Conditioner, Model # LW1817IVSM cannot be used as a Through-the-Wall AC...^IFV
Answered by: Ivanf
Date published: 2021-06-01

Will this unit fit inside a 26.5 inch wide window opening if used without side fillers?

Asked by: daveocoolguy
The LG 18,000 BTU DUAL Inverter Smart wi-fi Enabled Window Air Conditioner, Model # LW1817IVSM has a width of 26" without the front grille so it will fit into an opening of 26 1/2", but you definitely cannot use the left and right curtain panels, so you will need to find some way of closing the openings on either side of the air conditioner after installation. You also need to take into consideration that you only have a 1/4" of room on either side of the air conditioner to work with when installing it which will not be enough space to fit your hands through to hold the unit securely while installing it. The unit weighs 110 lbs and that might be a challenge if you cannot get your hands around the unit to hold is securely to install it...^IFV
Answered by: Ivanf
Date published: 2020-07-19
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