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18,000 BTU Room Air Conditioner

10.7 EER 5.3 Pts/Hr Dehumidification 24 Hour Timer
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Energy Star Rated
Energy Star Rated Energy Star products save energy without sacrificing on performance. They’re great for the environment, and they lower your monthly utility bills. Plus, some customers can receive tax breaks or rebates for buying Energy Star-rated appliances.
quick specs
Width: 24 3/8 Inch
Depth: 25 3/8 Inch
Height: 16 3/4 Inch
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Product Information
Brand: LG
Model: LW1812ER
Width: 24 3/8 Inch
Depth: 25 3/8 Inch
Height: 16 3/4 Inch
Type: Window / Wall
Chassis Type: Slide Out
Wall Sleeve Included: No
Maximum Cooling Amps: 7.2 Amps
Maximum Cooling Watts: 1,680 Watts
Heat: No
CFM Room Circulation: 420 CFM
Energy Efficiency Rating: 10.7
Control Type: Digital
Remote Control Included: Yes
Window Type: Standard
Technical Details
Energy Star Rated: Yes
ADA Compliant: No
Plug Type: 6-15P
Voltage: 230/208 Volts
UPC: 048231365833

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From the Manufacturer

Window Air Conditioner - LW1812ER
Efficiency, Meet Innovation
Cooling a big room doesn't always have to cost you big bucks. It's all about efficiency. Their 18,000 BTU unit can cool a large room up to 1,000 square feet without breaking the bank. The Auto Restart will automatically turn the unit back on following a power loss caused by a storm, wind, or extreme heat - so you don't have to.

3 Cooling and Fan Speeds with Auto Cool
Three powerful cooling and fan speeds allow you to control the temperature of your room at your pace.

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. Their stylish remote control is easy to use and allows you to cool down from across the room.

Welcome To LG
LG Electronics USA Commercial Air Conditioning business is a leading player in the global air conditioning market, manufacturing both commercial and residential air conditioners and providing total sustainability and building management solutions. From consumer units to commercial air conditioning systems, LG provides a wide range of innovative products for heating, ventilating and air conditioning.

How To Choose A Room Air Conditioner
Compared to large capacity central units, room air conditioners have several advantages. The initial cost of a room air conditioning unit is significantly lower than the cost of central air. Because room air conditioners are designed for cooling small spaces, operating costs are reduced. And, room air conditioners can provide personalized temperature and humidity controls that central systems cannot.

Calculating Cooling Capacity
Cooling capacity is the critical factor in properly selecting a room air conditioner. Cooling capacity is measured in British Thermal Units (BTUs) and typical models will range in capacity from 5,000 BTUs to 28,500 BTUs.

Choosing an undersized unit will overwork the unit and it will not cool properly. Choosing an over-sized unit will cost more to buy and operate and it will not dehumidify properly.

We can help you to calculate capacity. Be prepared to provide specific information on:
  • Room Dimensions
  • A simple floor plan to show the location of doors and north-facing windows
  • The number of people it will serve
  • Sources of heat such as lamps, TV and appliances
  • An explanation of what's above the intended room
  • Your insulation provisions
Cooling Capacity by Room Size
Measure the length and width of the area to be cooled. Multiply the length by the width to determine square footage or square meters. Locate the room size in the chart below to select the appropriate BTUs. Then use the product information to select the unit for your room. When cooling rooms with uninsulated ceilings, great rooms, or southern or western sun exposures - step up to the next BTU size.
Room SizeBTU
Sq. Ft.Sq. m
15014 up to 5,000
16515 5,200
Air Conditioner Tips
Air flow - Keep air filters clean. Do not block air flow areas.

Roomside view - J-models feature concealed power cord storage, this eliminates excessive cord exposure when receptacle is located close to unit.

Wall Opening For RAB46/47/48 Cases
A finished opening of 26 1/8" x 15 3/4", clear of intrusions, is required. Keep clearance of 4" from side walls. Brick veneer or frame walls should have wood studding surrounding case to provide firm anchoring with screws. Case can be fastened directly to brick or block walls with screws sunk in lead expansion shields. NOTE: units should be caulked on all four sides of case to the building exterior to assure building integrity.
  • Energy Info
  • Specifications
  • Features
  • Reviews

Energy Info

This air conditioner has an Energy Efficiency Rating of 10.7 and has an estimated yearly operating cost of $139.92.

Your operating costs will depend on your utility rates and use. The estimated yearly operating cost is based on the 2011 national average cost of $.1109 cents per kWh for electricity and an estimated number of operating hours of 750 hours.

For more information, visit www.ftc.gov/appliances.


BTU Performance:  
18,000/17,800 BTU
Energy Star:  
5.3 Pts/Hr
Dry Air Flow:  
420 CFM
dBA Level (Indoor/Outdoor):  
62/67 dBA
Est. Cooling Area:  
701 - 1,000 Sq. Ft.
Thermostat Control:  
Air Direction:  
Remote Controller:  
Energy Saver Function:  
24 Hr. On/Off
Fan Speed Cooling:  
Fan Only Speed:  
In Door Fan Type:  
Type Air Discharge:  
Top Discharge
Outdoor Vent/Exhaust:  
Chassis Type:  
Slide In-Out
1 Year Parts and Labor
Electrical Rating
230/208 Volts
1,680/1,660 Watts
Rated Amps:  
7.2/8.2 Amps
Dimensions and Weights
Overall Width:  
24 3/8"
Overall Depth:  
25 3/8"
Overall Height:  
16 3/4"
Net Weight:  
110.5 Lbs.
Shipping Weight:  
124.6 Lbs.
Stuffing Quantity (20 Ft./40 Ft.):  


  • 18,000/17,800 BTU
  • Cooling EER (BTU/Watts) 10.7
  • Dehumidification (Pts/Hr) 5.3
  • Est. Cooling Area 701 - 1,000 Sq. Ft.
  • 3 Cooling and Fan Speeds with Auto Cool
  • 4-Way Air Direction
  • Power Failure Auto Restart
  • Remote Control
  • Timer 24 Hr. On/Off

LG LW1812ER Reviews