LG Single Split Systems – Ceiling Concealed Duct Review


From $892

Product highlights
  • Zone Control
  • Discrete design
  • Zone Control
Compare Air Conditioning Rating
Brand reliability score
Capacity (kW) of systems in this series
2.5 kW, 3.4 kW, 5.0 kW, 7.1 kW

Key Features

Quiet Operation

These feature reduced noise, despite the ESP being increased.

Flexible Installation

The positioning of air intake has 2 options: at the bottom and at the rear, allowing for flexibility during installation.

Easy Maintenance

The panel is divided into two components; one for the heat exchange and the other for the fan and motor. This helps users easily detach and re-install the unit’s filter.

Reduced Height

A height of 270 mm allows for installation in spaces where space is at a minimum.

Two Thermistors

To counter possible differences between ceiling and floor air temperature, two thermistors can assist in optimising indoor air temperatures.

Multiple Room Conditioning

A spiral embedded or flexible duct and stream chamber allow for the cooling / heating for several rooms simultaneously.


Front Panel Colour
Reverse Cycle
Indoor Type
Ceiling Mounted
Power Supply
1 Phase, 220-240, 50Hz
Manufacturer Warranty (Years)
5 years
Number of fan speeds

LG Single Split Systems – Ceiling Concealed Duct

Specification2.5 kW 3.4 kW 5.0 kW 7.1 kW
Model Number - Indoor UnitCL09R N20CL12R N20CL18R N20CL24R N30
Model Number - Outdoor UnitUU09WR UL0 UU12WR UL0 UU18WR U20 UU24WR U40
Cooling Capacity (kW)1.1/2.5/3.2 1.4/3.4/3.9 2.0/5.0/6.0 4.0/7.1/7.7
Heating Capacity (kW)1.2/3.2/3.6 1.6/4.0/4.7 2.2/6.0/7.2 2.0/7.5/8.2
Indoor Sound Level (H/SL)31 / 28 / 27 31 / 28 / 27 36 / 34 / 3139 / 35 / 32
Indoor unit Dimensions (HxWxD) (mm)270 x 900 x 700270 x 900 x 700270 x 1250 x 700270 x 1250 x 700
Outdoor unit Dimensions (HxWxD) (mm)545 x 770 x 288 545 x 770 x 288650 x 870 x 330 834 x 950 x 330

* C = Cooling H = Heating

Links and Documents

Operational manual and other product-related documents

Controller Features

  • Zone control optional
  • Holiday scheduling
  • Screen lock
  • Dongle optional
  • Efficiency controls
  • Energy monitoring
  • Intuitive interface

Other Features

  • Diverse applications
  • Energy efficient
  • Lower cooling costs


Prompt service

I live in an apartment that my son owns and two of two the rooms each have an LG window air conditioner/heater in it. They are both about two years old and I have 1 of those years enjoyed them perfectly. Last week 1 of them stopped working so I needed a repairmen whom promptly came (within two days).

— Pascale, 9 September 2016

Great Units!

Have had the LG WH24SL-18 (7.1kW) and the WH09SK-18 (2.5kW) installed recently.
Must say I am impressed with the quick cooling from these units and they are also internet ready straight out of the box.
I have 2 Mitsubishi units of same kWh capacity and they don’t come close to cooling performance compared to the LG’s.
Also the ability to operate from an app on my phone is terrific ! The app shows both the room temp and A/C set temp for both units and is well thought out with all the setting options required.
We are yet to see the very high summer temps, but they have already showed they will be a good unit during summer.

— Peter, 22 October 2019


Great air conditioner. The price pretty good.

The 2 units we have run all day during summer (North Queensland) without an issue. They work quickly and quietly. The inverter must be good as our power bills are lower than other people we know with regular splits.

Great looking, works well. Everyone notices them. Easy to clean. Quiet

The control board died in the larger unit after a year but was replaced under warranty (5 years!). We had 2 “premium” brand air cons in a rental that both suffered the same issue.

— Disco, 29 February 2012

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