LG White 12,000 BTU Thru-the-Window Air Conditioner - Energy Star

Model #LW1217ERSM

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Tech Specs

Fuel Type Electric
Certifications Energy Star
Voltage 115
Cooling Amps 9.3 Amps
Temperature Options Cooling Only
Compatible Home Automation Systems Nest

Heating & Cooling

Items Included Remote Control
Chassis Type Slide Out
CEER (Combined Energy Efficiency Rating) 12
SEER (Seasonal Energy Efficiency Rating) 12.1
Installation Type Window
Assembly Required No


Weight 81
Type Thru-the-Window
Appliance Color White


Height 15"
Width 23.63"
Depth 22.19"
User Reviews
12 July 2021

I have used it once so far. It worked well, nicely cooled my entire dining and living room areas. The noise level was low which made it comfortable to have a conversation around it. I will probably have another update two months from now

  • +

    Style/Design, ease of use, Features/Settings, Performance, Quality

7 July 2018

I purchased a few weeks ago and it cools three rooms and a hallway! It's awesome. I have to keep it on auto as the first two days it was too cold. By far the best decision ever purchasing LG. Love it. [This review was collected as part of a promotion.]

18 June 2021

Love this unit. I purchased two to replace two 15 year old units. Easy to install, energy efficient, keeps both areas where they were installed cool using the energy saver mode. I installed these "through the wall" and not a window and they fit perfectly. I would highly recommend these units.

  • +

    Style/Design, ease of use, Features/Settings, Performance, Quality

28 June 2018

We bought this to replace a unit in our upstairs master suite in Hawaii. Room is on the west faces no signs de of the house with very little insulation so it gets quite warm in the afternoons. Our old unit rattled and vibrated when going on and off.

5 July 2021

The cooler works as described. The cons to the unit are thethin cabinet and the lack of a grill on the back. The inside components are completely exposed to dirt and all weather elements since the case is open in the back If you want it covered, you have to purchase a grill separately.

  • +

    ease of use

30 June 2018

I replaced a swamp cooler with the LG air conditioner and it's been fabulous . My living room, dining room and kitchen are open space about 1000 square feet and it has kept it cool about 72 degrees. Outside temperature high 90's to 102 so far.

7 September 2021

purchased june 2020. worked fine for 3months, off for winter. ran may-august 2021, whencompressor will not work anymore, only puts out loud grating noise when it tries to kick in.bottom line, AC worked for approximately 6+ months, before it broke down,

  • +

    Features/Settings, Performance

2 July 2018

We bought this product and we love it. Cool the living room like we wanted. Although, we had to change out the window to have it fit - it was well worth it. [This review was collected as part of a promotion.]

9 June 2021

I brought this air conditioner a week ago and I just love it I put it in my livingroom and keep my 3 rooms nice and cool and you don't hear it running just Beautiful, love LG product I own 4 LG tv 's keep on making this Beautiful product LG, God bless LG forever Deletha Daniels.

  • +


31 August 2018

I bought this when my central air went out and repairs couldn't be made for 4 days. Helped to keep my home cool during this time. [This review was collected as part of a promotion.]

Product Description

Cool a little while you save a lot. With 12,000 BTU this Smart (Wi-Fi Controllable) Energy Star Air Conditioner will save you energy and money while cooling a room up to 550 square feet. Plus, we've got you covered with Auto Restart, so when storms, high wind or heat waves cause a power outage, your unit automatically turns back on when power returns. This unit works with your Smartphone control (Apple IOS and Android).


Control all your LG appliances from one App. SmartThinQ gives you full feature control from anywhere. Including temperature, scheduling, mode and fan speed.

Power Failure Auto Restart
Living isn't always easy in the summer. There are storms, high winds and extreme heat that can lead to power outages. Keep yourself covered with Auto Restart, which automatically turns the unit back on when power is restored.

Electronic Touch Controls with Remote
Control the temperature of your room with just a push of a button. Our stylish remote control is easy to use and allows you to cool down from across the room.

Works with Nest

Product Highlights
  • Width: 23.63"
  • Height: 15"
  • Depth: 22.19"
  • CFM: 265
  • Fuel Type: Electric
Still Have Questions?
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