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12,000 Class BTU Ceiling Cassette Mini Split Indoor Air Conditioner

Inverter Chaos Wind R-410A Refrigerant

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Product Information
Brand: LG
Model: LMCN125HV
AC System Type: Mini Split
Component Type: Indoor Unit
Operation: Cooling with Heat Pump
Placement Type: Ceiling Cassette
Wireless Remote Control(s) Included: Included
Wired Remote Control(s) Included: Optional
Thermostat Range - Cooling (F°): 14 - 118
Thermostat Range - Heating (F°): 0 - 64
BTU Class: 12,000 BTU
Heating Capacity: 13,800 BTU
Electrical Data
Power Source V / Hz / Ø: (208/230/60/1)
Rated Amps: 0.25 Amps
Fan: Turbo
No. of Fans: 1
Motor: Brushless Digitally Controlled
Motor Drive: Direct
Energy Star Certified: No
Moisture Removal (Pts/hr): 4.2 Pts./Hr.
Airflow Rate Low (CFM): 247 CFM
Airflow Rate Medium (CFM): 283 CFM
Airflow Rate High (CFM): 335 CFM
Operating Sound Level - Low (dB): 32 dB
Operating Sound Level - Medium (dB): 35 dB
Operating Sound Level - High (dB): 38 dB
Temperature Sensor: Dual Thermistor
Piping Connections
Power and Communication Cable - No.: 4
Power and Communication Cable - AWG: 18
Liquid Line Outer Diameter: 1/4 Inch
Suction Line Outer Diameter: 3/8 Inch
Drain Line Outer Diameter: 1 1/4 Inch
Drain Line Inner Diameter: 1 Inch
Refrigeration System
Refrigerant Type: R-410A
Refrigerant Connection Type: Flare
Refrigerant Control: EEV
Max. Line Length - Each: 82 Ft.
Control Lock Function (Concealed Duct Only): No
Human Detection Technology: No
Room-Freeze Protection: No
Filter Clean Notification: No
Hot Start Heating System (Heat Pumps Only): Yes
Program Timer: Yes
Manual Power Switch: No
Defrost/Deicing: No
Air Filter: Yes
Filters Washable?: Yes
Filters Anti-microbial?: Yes
Restart Delay: No
Self-diagnosis: Yes
Condensate Sensor Connection: No
Soft Start: No
Quiet/Sleep Mode: No
Self-Cleaning Indoor Coil: No
Built-in Drain Pump (Indoor Unit): Yes
Hidden Display: No
Surge Cool/Heat: Yes
Auto Operation: Yes
Auto Restart on Power Failure: Yes
Auto-changeover: No
Automatic Louver Adjustment: No
4-Way Swing: Yes
Dehumidifying Mode: Yes
No. of Fan Speeds: 3
Technical Details
ADA Compliant: No
Voltage: 230/208 Volts
Warranty Terms
Parts Warranty: 5 Year
Dimensions & Weights
Width: 22 7/16 Inch
Depth: 22 7/16 Inch
Height: 8 7/16 Inch
Net Weight: 31 Lbs.
Shipping Weight: 36 Lbs.
UPC: 048231361927
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From the Manufacturer

LG 12,000 BTU Ceiling Cassette Indoor Air Conditioner
With this LG ceiling cassette air conditioner, you have lots of airflow options. The air conditioner has 4 independent motorized guide vanes which can discharge airflow in a counterclockwise pattern, lock to custom fixed positions, and even be set for random air distribution. Plus, you can choose from 5 fan settings in cooling mode and 6 in heating mode. This air conditioner includes a washable air filtration system for healthier, purer air. A wireless handheld remote-controller is also available; an LG-supplied wired controller is available separately.
  • Specifications
  • Features
  • Reviews
  • Warranty Info


Cooling with Heat Pump
Component Type:  
Indoor Unit
Placement Type:  
Ceiling Cassette
Wireless Remote Control(s) Included:  
Wired Remote Control(s) Included:  
Nominal Cooling Capacity:  
12,000 BTU/h
Nominal Heating Capacity:  
13,800 BTU/h
Electrical Data
Power Supply (Phase/V/Hz):  
Power and Communication Cable (No. x AWG):  
4 x 18
Rated Amps:  
0.25 Amps
No. of Fans:  
Brushless Digitally Controlled
Motor Drive:  
Airflow Rate - Low:  
247 CFM
Airflow Rate - Med.:  
283 CFM
Airflow Rate - High:  
335 CFM
Operating Sound Level - Low:  
32 dB
Operating Sound Level - Med.:  
35 dB
Operating Sound Level - High:  
38 dB
Temperature Sensor:  
Dual Thermistor
Refrigeration System
Refrigerant Type:  
Refrigerant Control:  
Liquid Line O.D.:  
Vapor Line O.D.:  
Drain O.D.:  
1 1/4"
Drain I.D.:  
Auto Operation:  
Auto Changeover:  
Program Timer:  
Surge Cool/Heat:  
Soft Start:  
Hot Start Heating Function:  
Quiet/Sleep Mode:  
Human Detection Technology:  
Dehumidifying Mode:  
Air Filter:  
Primary Filter:  
Washable Pre-Filter
Secondary Filter:  
Optional Plasma
Room Freeze Protection:  
Auto-Reatart on Power Failure:  
Built-in Drain Pump:  
Parts Warranty:  
5 Year
Labor Warranty:  
Dimensions and Weights
Overall Width:  
22 7/16"
Overall Depth:  
22 7/16"
Overall Height:  
8 7/16"
Net Unit Weight:  
31 Lbs.
Shipping Weight:  
40 Lbs.


Ceiling Cassette Indoor Air Conditioner

Ceiling Cassette Indoor Air Conditioner

Fan Features
Jet Cool

Operates at a high speed for up to 30 minutes to quickly cool a room.

Control lock function

Prevents children or others from tampering with indoor air conditioner settings.

Auto Operation

Provides three levels of comfort from which to choose. Temperature and fan speed is set automatically.

Auto Restart

Automatically restarts the system after a power failure.

Two Thermistor Control

Provides more accurate temperature control by gauging temperature levels from both the indoor air conditioner and the wired remote controller.

More Features
Wireless LCD remote controller included

Drain pump included

Required Ceiling Grille (PT-UQC) sold separately

Plasma kit PTPKQ0 sold separately

LG LMCN125HV Reviews

Warranty Info

Warranties on mini split air conditioners only include parts and do not include labor. The licensed HVAC Technician who installs your air conditioner should always provide you with a labor warranty (preferably for at least a full year to compliment the manufacturers' parts warranty).

AJ Madison will only finalize a Mini Split (Ductless Split System) purchase with an authorized HVAC Technician. AJ Madison recommends the installation of a mini-split system to be performed by a trained and qualified HVAC technician with the proper knowledge and background. A trained technician will be able to judge the best location for the air handling (evaporator) unit and also the correct size for the area the unit will heat and/or cool. For assistance with all your technical needs please contact our technical department at

Should you experience an issue during the installation or the initial startup of a unit please do not contact the manufacturer. You should have the technician that installed your system contact either AJ Madison or the manufacturer. We cannot accept any service or warranty calls from anyone but a licensed HVAC technician. We have a full technical support team available to help you throughout the installation process.

AJ Madison, Inc. cannot be held liable for improper installation and operation of any product purchased from our company. Should a warranty issue arise in which parts will need to be replaced, an installation receipt will be required along with your AJ Madison sales receipt. Failure to provide a receipt or invoice may result in the warranty not being honored.