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18,000 BTU Class Multi-Zone Ductless Split Outdoor AC Unit

Low Ambient Operation R-410A Refrigerant Auto Restart
Product Information
Brand: LG
Model: LMU187HV
AC System Type: Mini Split
Component Type: Outdoor Unit
Operation: Cooling with Heat Pump
No. of Rooms: 2
Min No. of Connectible Indoor Units: 2
Max No. of Connectible Indoor Units: 2
BTU Class: 18,000 BTU
Heating Capacity: 17,000 BTU
Min Connectable Capacity: 18,000 BTU
Max Connectable Capacity: 24,000 BTU
Electrical Data
Power Source V / Hz / Ø: (208/230/60/1)
Running Current Cooling - Min. (Amps): 1.5 Amps
Running Current Cooling - Rated (Amps): 5.2 Amps
Running Current Cooling - Max. (Amps): 10.8 Amps
Running Current Heating - Min. (Amps): 1.5 Amps
Running Current Heating - Rated (Amps): 6 Amps
Running Current Heating - Max (Amps): 11.3 Amps
Power Input Cooling - Min. (Watts): 260 Watts
Power Input Cooling - Rated (Watts): 1,112 Watts
Power Input Cooling - Max. (Watts): 2,370 Watts
Power Input Heating - Min. (Watts): 280 Watts
Power Input Heating - Rated (Watts): 1,290 Watts
Power Input Heating - Max. (Watts): 2,480 Watts
Compressor Noise Level - Cooling (dB): 51 dB
Compressor Noise Level - Heating (dB): 51 dB
Energy Star Certified: No
EER (Energy Efficiency Rating): 14
SEER (Seasonal Energy Efficiency Rating): 21
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
Refrigeration System
Refrigerant Type: R-410A
Compressor Type: Inverter
Factory Precharge: 67 Oz.
Max. Line Length - Each: 82 Ft.
Max. Height Diff. btwn. Indoor and Outdoor Units: 49 Ft.
Max. Height Diff. btwn. Indoor Units: 24 Ft.
Outside Temperature Range for Cooling - Min.: 14 °F
Outside Temperature Range for Cooling - Max.: 118 °F
Outside Temperature Range for Heating - Min.: 0 °F
Outside Temperature Range for Heating - Max.: 64 °F
Inverter (Variable speed compressor): Yes
Corrosion Protection: Yes
Technical Details
ADA Compliant: No
Warranty Terms
Parts Warranty: 7 Year
Dimensions & Weights
Width: 34 1/4 Inch
Depth: 12 19/32 Inch
Height: 31 13/16 Inch
Net Weight: 123.5 Lbs.
Shipping Weight: 132 Lbs.

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From the Manufacturer

LG 18,000 BTU Dual-Zone Outdoor Mini-Split AC Unit (x{c1.number_of_zones_LMU187HV})
This LG unit connects with 2 indoor mini-split units to provide both cooling and heat to your home. Equipped with a state-of-the-art Inverter compressor, this unit can adapt its performance to the specific temperature needs of your environments, optimizing energy usage and saving your energy bill over time. This reliable model is protected with GoldFin coating to help prevent corrosion over time, and is backed by a 5 year compressor warranty from LG.

Features You'll Find with LG Ductless Systems

Room by Room Temperature Control
LG's revolutionary Inverter technology boasts a powerful, yet quiet performance, while minimizing energy consumption. With world-class energy efficiency and a controller for every indoor unit, enjoy comfortable surroundings while saving energy.

Quiet Operation
LG DFS systems operate at low sound levels, thanks to LG's unique low vibration compressor, skew fan, and brushless direct current (BLDC) motor technology that eliminates unnecessary noise and allows for smooth operation.

Improved Air Quality
The filtration system of an LG DFS system is unique in design and certified by world-renowned institutes. It works as an invisible grid that provides clean and reliable air to the homeowner. 3M Micro protection filters reduce dust and microscopic particles including pollen, pet dander and odors.

Easy Installation
LG DFS systems are designed for easier and more efficient installation, regardless of the surroundings. By reducing the number of contractors and time required, it is now possible to install a DFS system in a shorter amount of time.

° Older Homes
° Sunrooms and Additions
° New Home Construction
° Office Buildings
° Restaurants
° Hospitals / Medical Facilities
° Houses of Worship
° Retail Establishments
° Nursing Homes
° Schools

LG Duct-Free Split Systems
There's no need to compromise when it comes to comfort. For truly customized comfort in all rooms, consider an LG Duct-Free Split (DFS) system. LG DFS systems make it easier to provide customized cooling and heating - no more bulky window units and no need to tear down walls.

LG Duct-Free Split (DFS) multi-zone Inverter systems provide a smart alternative to both central HVAC and window-mounted air conditioners, and are available in a variety of configurations to suit different cooling and heating situations-zones in residential and small office buildings. Installation by a qualified HVAC contractor is safe and easy - little to no duct work or sheet metal is required.

About LG
LG home appliances are right in step with your busy world by offering the next step in home innovations. With technologically advanced solutions and top-performing products, LG appliances allow your home to work more efficiently so you can spend more time on the things that matter most. LG offers a full range of kitchen appliances, innovative appliance accessories, vacuums, air conditioners and more - all designed to make life good. Available at AJ Madison.
  • Features
  • Reviews
  • Warranty Info


Outdoor Unit

Outdoor Unit

Inverter (Variable Speed Compressor)

Instead of shutting off once the desired temperature is reached, an Inverter compressor continues to operate at low speed to maintain that temperature. The AC unit is quieter to operate and uses less energy than conventional ACs, which cycle on and off.


Shuts down the indoor fan to prevent cold air from being blown into the zone. Removes frost from outdoor coil when the outdoor temperature is low.


A self-troubleshooting function that makes it easier to diagnose malfunctions, reducing service labor.

Auto Operation

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

Auto Restart

Automatically restarts a unit to programmed setting when the electricity comes on after a power failure.

Gold Fin™ Anti-corrosion

All DFS system outdoor unit coils have a corrosion resistant GoldFin™ coating standard from the factory. GoldFin™ will promote sustainable efficiency and coil life by helping to prevent corrosion caused by everyday pollutants.

LG LMU187HV 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.