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Boston Appliance Winner of Best of Northshore EDITORS' CHOICE AWARD

Boston Appliance Showroom ®

60 Cummings Park, Woburn, MA 01801

LG Logo

12,000 BTU 230v Through-the-Wall Air Conditioner

Model # LT1236CER

 4.9 out of 5 (8 Reviews)

Call (781) 935-2700
For Best Price

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LG air conditioners have met the high standards of the ENERGY STAR® Program by designing products with advanced energy-efficient technologies.

Energy Guide Label*

Estimated yearly energy cost is $109**. Your exact costs will depend on use, local utility rates and the type and source of your energy.

Maximum Cooling

LG air conditioners provide exceptional cooling power that will keep you and your family cool, comfortable, and in control.

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.

Made to Perfection

LG air conditioners add powerful performance and stable durability to perfectly match your frame.

Easy Installation and Usage

LG air conditioners are designed for easy and efficient installation and come with a washable and reusable air filter.

3 in 1 Operation

The cool mode is ideal for powerful cooling and dehumidifying in hot days. In fan mode, the fan circulates air while dry mode is ideal for rainy and damp days.

Maximum Usability

Operate with LED display and simple selection control panel, up/down temperature adjustments, and fan speed selection, using the full-featured remote without leaving your bed, workspace, or couch.


  • ENERGY STAR® Qualified
  • Remote Control
  • 3 Cooling & Fan Speeds
  • Trim Kit Included
Cooling BTU Performance 11,500/11,800
Est. Cooling Area (Sq. Ft.) 550
CEER 10.5/10.5
Dehumidification (Pts/hr) 3.9
Refrigerant R32
Noise Indoor dB (A) (High/Low) 59/55
Noise Outdoor dB (A) (High) 65
Dry Air Flow (CFM) 280
Shipping Dimension (WxHxD) 27.72 x 17.41 x 22.41 inch
Product Dimension (WxHxD) 24.00 x 14.41 x 20.09 inch
Net Weight (lb) 82
Shipping Weight (lb) 91
Fan Speed Cooling 3
Fan Speed Only 3
Indoor Fan Type Turbo
Air Deflection 4-Way
Energy Saver Function Yes
Thermostat Control Thermistor
Remote Control Yes
Compressor Rotary
Air Discharge Type Top Discharge
Chassis Type Top Down
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) 1,080/1,110
Cooling Current (A) 5.5/5.0
Color White
Installation Kit Yes
Air Filter Washable
Parts & Labor 1 Year Parts and Labor
UPC 048231379649

Extended warranties are usually very inexpensive and can save you thousands in the future. Some can even cover extra costs that result, such as cost of food that spoils when your fridge dies. It's simple and inexpensive to purchase extended warranties and one of the smartest ways to protect your investment.

Appliances can be large, heavy, and expensive and you probably don't have the special tools or expertise needed to fix them in a crisis. If you can spare a few thousand dollars without batting an eyelash for new appliances should they break tomorrow, don't buy a warranty. But if you're like most of us, protect yourself by purchasing inexpensive extended warranties when you buy a new product and save yourself big money in the long run.

Professional delivery and installation is available for every product we sell. We would be happy to coordinate delivery and installation for you. Please consult a sales associate about delivery options.

Questions or Comments?
Call (781) 935-2700 for assistance. Click Here for Boston Appliance ® location and contact information.

When it comes to buying new appliances for your home, there are a lot of choices available to you. We merchandise our store with careful consideration, striving to carry the appropriate variety of the best brands available today. We know everything about our products and are eager to help you find anything that fits your unique needs. Let us help you find your perfect match in size, features, price, and style.

Finding the right appliance can be a daunting task, but one well worth the effort. You'll use your new appliances often, and they add value, style, and convenience to your home. Make sure you have the right information to help you make these important decisions. Shop with experts who can show you the best selection available and answer all your questions; come see our inventory of the latest trends and the most dependable manufacturers.

Because we know our products inside and out, our service doesn't end with your purchase. We have long standing relationships with the most popular manufacturers and all the product knowledge to help you maintain healthy efficient appliances for the duration of their lives.

Shop where you can see the finest selection of the best products available today to match your budget, needs, and style. Shop where experts can guide you through the myriad of options available and can answer your every question. Shop where you get exceptional service for the life of your appliance.

Come shop with us!


out of 5 (8 Reviews)

87% of reviewers recommend this product.

New A/C

Submitted by Gina 315 - 12/24/2020

Its pretty a little noisy but I like the DRY feature. Also I got it for a relatively great price match so I was happy Also like the fact that I bought the warranty and if you dont need a repair within five years you get reimbursed. Win-win
Originally posted on

Yes, I recommend this product

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Great unit

Submitted by Samson 12 - 12/13/2020

Great unit nice and sleek not too noisy and easy to install
Originally posted on

Yes, I recommend this product

Havent had a problem after 6 months

Submitted by govenator - 12/11/2020

Seems good quite and doesnt draw too much energy.
Originally posted on

Yes, I recommend this product

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Perfect for my house

Submitted by barbinOK - 12/11/2020

Perfect for my 2 bedroom house This replaced an old LG air conditioner I had for many years.
Originally posted on

Yes, I recommend this product

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Great Cooling

Submitted by wanderguy - 8/29/2019

Ive only had it about 3 weeks but its made a world of difference in my place... the cooling effect is great and most welcome and I should add much needed. Glad its here. Looking for many years of cool comfort.
Originally posted on

Yes, I recommend this product

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Fully satisfied

Submitted by Denny13 - 7/25/2019

I bought my LG unit a month ago and couldnt be more satisfied. It performs exactly as advertised cooling the room quickly and efficiently. I am happy I purchased it and the rebate received made the price even better.
Originally posted on

Yes, I recommend this product

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Works well but some parts not very durable

Submitted by Jeff1922 - 7/17/2019

We bought this to replace a very old wall air conditioner. The first one that was shipped to me was damaged so badly in shipping that it would not work. The second works fine - cools well - relatively quiet - controls easy to work. However this one was also damaged in transit - the catches for the filter cover were all broken when unpacked. At this point I can tolerate no further delays so we will use as is and hold the cover shut with tape.
Originally posted on

No, I do not recommend this product

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Great Performer

Submitted by Soccer Al - 5/11/2019

We have only had this unit for a few months but when needed it has done a great cooling job and to our surprise very quietly. It is so efficient that it has had no measurable impact on our electrical bill.
Originally posted on

Yes, I recommend this product

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