12,000 Class BTU Concealed Duct Mini Split Indoor AC Unit with 13,800 BTU Heat Pump, Control Lock, Auto Operation and Wired Remote Controller

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15 ft. Insulated Refrigeration Line Set for 9,000-12,000 BTU Indoor Units

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35 ft. Insulated Refrigeration Line Set for 9000-12,000 BTU Indoor Units

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LG 12,000 BTU Indoor Concealed Duct Indoor AC Unit (x{c1.number_of_zones_LMDN125HV})
This unit provides optimal temperature control that's quiet and virtually seamless. Designed for easy installation, this unit can be mounted above a finished ceiling with as little as 8 inches of vertical space. Equipped with Auto-Operation, the system will automatically adjust between Low, Med, and High fan settings in either Heating or Cooling Mode to maintain the desired set temperature. It also comes with an advanced plasma filtration system that's washable for easy upkeep. This unit includes its own wired remote-controller.
Operation: Cooling with Heat Pump
Component Type: Indoor Unit
Placement Type: Concealed Duct
Wireless Remote Control(s) Included: No
Wired Remote Control(s) Included: Yes
Nominal Cooling Capacity: 12,000 BTU/h
Nominal Heating Capacity: 13,800 BTU/h
Electrical Data
Power Supply (V/Hz/Phase): 230-208V/60Hz/1
Power and Communication Cable (No. X AWG): 4 X 18
Rated Amps: 0.25 Amps
Fan: Sirocco
No. of Fans: 2
Motor: Bushless Digitally Controlled
Motor Drive: Direct
Airflow Rate - Low: 265 CFM
Airflow Rate - Med.: 300 CFM
Airflow Rate - High: 335 CFM
Operating Sound Level - Low: 26 dB
Operating Sound Level - Med.: 31 dB
Operating Sound Level - High: 33 dB
Temperature Sensor: Dual Thermistor
Refrigeration System
Refrigerant Type: R410A
Refrigerant Control: EEV
Liquid Line O.D.: 1/4"
Vapor Line O.D.: 3/8"
Drain O.D.: 1 1/4"
Drain I.D.: 1"
Auto Operation: Yes
Auto-Changeover: No
Program Timer: No
Surge Cool/Heat: Yes
Soft Start: No
Hot Start Heating Function: Yes
Quiet/Sleep Mode: No
Human Detection Technology: No
Dehumidifying Mode: Yes
Air Filter: Yes
Primary Filter: Washable Pre-Filter
Secondary Filter: None
Room Freeze Protection: No
Defrost/De-icing: No
Auto-Restart on Power Failure: Yes
Self-Diagnosis: Yes
Built-in Drain Pump: Yes
Parts Warranty: 5 Year
Labor Warranty: No
Dimensions and Weights
Overall Width: 32 9/32"
Overall Depth: 22 5/8"
Overall Height: 7 1/2"
Net Unit Weight: 46 Lbs.
Shipping Weight: 50 Lbs.

Concealed Duct Indoor Unit (x{a.number_of_concealed_duct_zones})


  • Dehumidification Function

    Accurately measures room temperature and control humidity by adjusting the set point and fan speed.

  • Self-Diagnostics Function

    Makes it easier to diagnose malfunctions, reducing service labor.


  • 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 unit and the wired remote controller.

More Features

  • Wireless LCD remote controller included

  • Drain pump included

  • External static pressure control

Info and Guides

Adobe Acrobat FileConcealed Duct Unit Owners Manual

Adobe Acrobat FileConcealed Duct Unit Service Manual

Adobe Acrobat FileConcealed Duct Unit Spec Sheet

You will need Adobe Acrobat Reader to view and print pdf files

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Product 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 hvactechsupport@ajmadison.com.

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.

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Quick Specs
Quick Specs


  • AC System Type : Mini Split
  • Component Type : Indoor Unit
  • Operation : Cooling with Heat Pump
  • Placement Type : Concealed Duct
  • Wireless Remote Control(s) Included : No
  • Wired Remote Control(s) Included : Included
  • 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 : Sirocco
  • No. of Fans : 2
  • Motor : Brushless Digitally Controlled
  • Motor Drive : Direct
  • Energy Star Certified : No
  • Airflow Rate Low (CFM) : 265 CFM
  • Airflow Rate Medium (CFM) : 300 CFM
  • Airflow Rate High (CFM) : 335 CFM
  • Operating Sound Level - Low (dB) : 26 dB
  • Operating Sound Level - Medium (dB) : 31 dB
  • Operating Sound Level - High (dB) : 33 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"
  • Suction Line Outer Diameter : 3/8"
  • Drain Line Outer Diameter : 1 1/4"
  • Drain Line Inner Diameter : 1"

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) : Yes
  • Human Detection Technology : No
  • Room-Freeze Protection : No
  • Filter Clean Notification : No
  • Hot Start Heating System (Heat Pumps Only) : Yes
  • Program Timer : No
  • 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 : No
  • Dehumidifying Mode : Yes
  • No. of Fan Speeds : 4

Technical Details

  • ADA Compliant : No
  • Voltage : 230/208 Volts

Warranty Terms

  • Parts Warranty : 5 Years

Dimensions & Weights

  • Width : 32 9/32"
  • Depth : 22 5/8"
  • Height : 7 1/2"
  • Net Weight : 46 Lbs.
  • Shipping Weight : 51 Lbs.
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