To properly experience our website, you will need to use an alternate browser or upgrade to a newer version of internet Explorer (IE9 or greater).

The website utilizes responsive design to provide convenient experience that conforms to your devices screen size. In order to get the best possible experience our LG.COM website please follow below instructions.

If you’re using Internet Explorer 8 or earlier, you will need to use an alternate browser such as Firefox or Chrome or upgrade to a newer version of internet Explorer (IE9 or greater).

If you’re using Internet Explorer 9 and higher, turn off your Internet Explorer browser’s “Compatibility View settings” by following steps below:

  • Right click at the top of your browser and make sure the “Menu Bar” option is selected
  • Select “Tools” from the menu bar and then select “Compatibility View settings”
  • In the pop-up menu uncheck all three boxes and click “Close”
  • Your browser window will automatically refresh and you’ll be ready to go
Skip to Contents

11,500 BTU Thru-the-Wall Air Conditioner with remote

  • LT123CNR

Key Features

  • Universal Fit for Sleeve
  • Gold Fin Anti-Corrosion
  • 3 cooling and fan speeds with Auto Cool
  • 4-way air direction
EER 8.8 / 8.8
Dehumid. (Pts/Hr) 3.8
Dry Air Flow (CFM) 290
dBA Level (Indoor / Outdoor) 52 / 61
BTU Performance Cooling 11,500 / 11,200
Net Weight (lbs.) 80
Shipping Weight (lbs.) 87
Carton Height (inch) 17 13/32
Carton Width (inch) 27 23/32
Carton Depth (inch) 22 13/32
Dimension Height (inch) 14 13/32
Dimension Width (inch) 24
Dimension Depth (inch) 20 3/32
Thermostat Control Thermistor
Air Deflection 4-Way
Remote Control Yes
Energy Saver Function Yes
Programmable Timer 24Hr, On/Off
Fan Speed: Cooling (Heating) 3
Compressor Rotary
Indoor Fan Type Turbo
Type Air Discharge Top
Outdoor Vent / Exhaust Yes
Chassis Type XB
Auto Restart Yes
Fan Only 3
Real Grille Yes
Voltage / 60 Hz 208/230
Watts (Cooling) 1,310/1,270
Rated Amps (Cooling) 6.0/6.4
Warranty 1 Year Parts and Labor(Limited In-Home Service)

What People Are Saying

Rated 1 out of 5 by from Worked great at first, then not. At all. Unit was purchased for home climate control to assist a person with MS who is very heat sensitive. For the first 6 months it ran fine & was everything we wanted. Then the fan motor inexplicably began making a horrific, unbearably loud, unending grating noise. It continued to produce cool air, however the fan motor is so loud you can't stand to be in the same room with it. Since 6 months had elapsed it was no longer warranted, & we didn't purchase extended warranty from Home Depot. We're in a isolated town where no one seems to repair residential AC. It's very disappointing, especially since it was so nice when it was working.
Date published: 2015-05-27
Rated 5 out of 5 by from Much better than past air conditioner Works as expected cools large room. One feature that is plus controls are visible from floor level. Last air conditioner you could not see from floor you had to climb up to see. This is one reason why I purchased it. A great value for a good price, delivered to my door by UPS.
Date published: 2013-06-06
Rated 5 out of 5 by from Nice programming feature and quality built Replaced a 15 year old unit with this unit in out master bedroom and used the original sleeve. It literally took 5 minutes to frame in and plug in. A little noisy on high speed but that nicely drowns out the barking dog next door when when were sleeping. Well worth the price.
Date published: 2013-05-23
Rated 5 out of 5 by from Awesome deal and works great! We are a housing authority who have purchased close to 50 of this exact unit for our elderly housing high rises! They work great and our residents are happy with them! Thank You for the great product! No complaints thus far!
Date published: 2012-08-28
Rated 5 out of 5 by from Great Product We love our AC. It is quiet and very efficient in cooling our great room. We have a second unit in our master bedroom, and together the whole house is comfortable without the noise of a window unit.
Date published: 2011-10-07
  • 2015-10-09T09:07CST
  • bvseo_cps, prod_bvrr, vn_cps_3.1.6
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_5
  • loc_en_US, sid_MD00000474, PRD, sort_mostRecent
  • clientName_LG
  • bvseo_sdk, java_sdk, bvseo-
  • CLOUD, getReviews, 174ms

We're here to support you with our product.

Contact us for any purchasing inquiries.

Product Support


Ask your questions. Share your answers.

  • bvseo_sdk, java_sdk, bvseo-
  • CLOUD, getContent, 501ms
  • bvseo-msg: Execution timed out, exceeded 500ms;