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The Verdict

The LG 11,800 BTU Through-the-Wall Air Conditioner (LT12124CNR) delivers exactly what it promises on the spec sheet: powerful, rapid cooling for large spaces up to 530 square feet. Users consistently praise its ability to quickly drop room temperatures while operating with surprisingly low noise levels for an 11,800 BTU compressor. The inclusion of an Energy Saver mode and the highly efficient R-32 refrigerant keeps utility costs in check, while the 3-speed turbo fan and dedicated Dry mode offer versatile, everyday climate control.

The trade-offs primarily emerge during setup. The installation instructions are notoriously confusing, and getting the included trim kit to fit flush against the wall sleeve can require extra patience. Additionally, the power cord is relatively short, which may necessitate an electrical adjustment depending on your outlet placement, and the low-angle control panel visibility requires bending down to read the unit's display.

While the initial setup can be frustrating and the physical design has minor quirks, the core cooling performance is undeniably robust. At this price tier, you are paying for sheer cooling capacity and ongoing energy efficiency—both of which this model absolutely nails. If you have a standard wall sleeve ready or are hiring a professional to handle the tricky installation, the LT12124CNR remains a highly practical buy that will easily freeze out the summer heat without punishing your electric bill.

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Rating
ColorBright WhiteWhite—————
FeaturesInstallation Kit Included, Removable Air Filter, Low NoiseRemovable Air Filter, Low NoiseLow Noise, Installation Kit Included, Removable Air FilterLow Noise, Removable Air FilterLow Noise, Removable Air FilterLow Noise, Installation Kit Included, Removable Air FilterInstallation Kit Included, Removable Air Filter
BrandLGLGLGLGLGMideaPerfect Aire
TypeWindowWindowWindowWindowWindowWindowWindow
ControlsRemoteRemoteRemoteRemoteRemoteRemoteRemote
RefrigerantR-32R-32R-32R-32R-32R-32R-32
EfficiencyNot CertifiedNot CertifiedNot CertifiedNot CertifiedNot CertifiedNot CertifiedNot Certified

About this product

  • Energy Efficient R-32 Refrigerant. With an energy efficiency ratio (EER) of 10.6, this ac wall unit employs the most efficient refrigerant currently used in the industry
  • Wall Mounted AC Unit. This 11,800 BTU ac wall unit is suited for a through the wall installation; It is not properly vented for a standard window installation; The wall air conditioner has dimensions of 24” W x 20.1” D x 14.4” H
  • Confident Cooling. This air conditioner features 3 cooling speeds and 3 pre-programmed modes meant to cool rooms up to 530 square feet using a turbo fan
  • Wall Unit Modes. Energy Saver mode keeps the fan running to circulate air but turns off the compressor when your desired room temperature is reached; Dry mode removes moisture from your space; Cool mode keeps you comfortable on warm days with cold air
  • Accessories Included. A trim kit finishes the indoor installation, while a plastic mesh grille protects the outdoor; A washable, reusable filter, insulation foam, and a remote are also included. Wall Cutout Dimensions: 25.88 W x 16.72 L x 15.53 H

Specifications

Brand
LG
Model
LT12124CNR
Cooling Power
11800 BTU
Controls
Remote
Efficiency
Not Certified
Brand
LG
Type
Window
Features
Installation Kit Included, Removable Air Filter, Low Noise
Refrigerant
R-32
Coverage Area
530 Sq Ft
Noise Level
66 dBA
Width
24 inches
Height
14.44 inches
Depth
20.13 inches
Weight
76 pounds
Colour
Bright White
Warranty
1 year limited
Part number
LT12124CNR
Manufacturer
LG
GTIN
00048231607261