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LG Air Conditioning  |  SKU: LG-DC12

LG Deluxe 3.5kW High Wall System

High Street: £1,182.00 High Street: £985.00
Our Price:
£904.99 Inc. VAT £754.16 Exc. VAT

The Deluxe from LG is an A++ rated system which features active energy control for lower running costs, Plasmaster Ioniser Plus filtration and auto clean for removal of microscopic contaminants and unwanted moisture.

This system is also extremely quiet, running as low as 19db when in sleep mode.

It is ideal for domestic settings, where a powerful but quiet unit is required and top of the range filtration is a desired feature

Pre-order now to make sure you don't miss out!

As soon as it's back in stock, we will get in contact to arrange a convenient delivery date.

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Read our comprehensive FAQ page which provides answers to queries around system types and installation.

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CoolEasy says:

The most efficient 3.5kW system from LG with advanced filtration via LG's Plasmaster Plus Ioniser


The Deluxe (DC12) from LG is an A++ rated system which features active energy control for lower running costs, Plasmaster ioniser and auto clean for removal of microscopic contaminants and unwanted moisture. This system is also extremely quiet running as low as 19db when in sleep mode. It is ideal for domestic settings where a powerful but quiet unit is required. 


Plasmaster™ Ionizer Plus
Plasmaster™ Ionizer Plus generates over 3 million ions to sterilize and deodorize. It protects you from unpleasant odours and harmful substances in the air.

MULTI Protection Filter Powered by 3M Tech
The advanced technologies of 3M & LG remove harmful micro-particles including viruses, bacteria and allergens to provide a safer, healthier environment.

Active Energy Control - A++ rated system
Active Energy Control function allows you to select the level of energy consumption depending on the situation. Enjoy a cool and comfortable atmosphere while saving energy.
Normal: 100% cooling at 100% energy consumption
Step 1: Press the button once to 85% of cooling capacity at 74% energy consumption
Step 2: Press the button twice to 65% of cooling capacity at 54% energy consumption.

Plasmaster™ Auto Cleaning
The interior of the air conditioner is maintained by drying off the heat exchanger, then sterilizing the interior once more with plasmaster ions to eliminate unwanted mould and odours.

Dual Protection Filter
The Dual Protection Filter captures dust (sized over 10 microns) and bacteria.

The system kit contains:

  • Indoor Unit
  • Outdoor Unit
  • Remote Control

**UK F-GAS laws state you must provide us with details of the F-GAS registered engineer you will be using BEFORE we can dispatch any split systems**


  • Capacity (Cooling/Heating)(kW): 3.5 / 4.0
  • Power Input (Cooling/Heating)(W): 933 / 976
  • Running Current (Cooling/Heating)(A): 4.0 / 4.3
  • EER / COP (kWh): 3.75 / 4.1
  • SEER / SCOP (kWh): 7.6 / 4.6
  • Energy Label: A++
  • Annual Energy Consumption (Cooling/Heating) (kWh): 161 / 883
  • Dehumidification Rate (l/h): 1.3
  • Indoor: DC12.NSJ
  • Dimensions (mm): 837 x 308 x 189
  • Weight (kg): 9.1
  • Sound Pressure Level (H/M/L/S) (dB): 42 / 37 / 27 / 19
  • Sound Power Level (Max) (dB): 60
  • Outdoor: DC12.UL2
  • Power Supply (Φ/V/Hz): 1 / 220-240 / 50
  • Circuit Breaker (A): 15
  • Dimensions (mm): 770 x 545 x 288
  • Weight (kg): 34.1
  • Sound Pressure Level (Cooling/Heating) (dB): 49 / 51
  • Sound Power Level (Cooling) (dB): 65


Installation Info

The below information is a general guide and not for any specific air con system.

The installation will require the services of an F-GAS registered engineer, who will be trained and have experience of installing these systems

Indoor Unit - Pre-checks

  • Ensure there is no source of heat or steam nearby.
  • Ensure there is nothing stopping the installation of the unit before drilling holes.
  • Do not mount above a shelf or a cupboard that could restrict air circulation.
  • For the unit to work effectively in cooling mode, it must be mounted 2m off the ground or above head height.
  • Make sure the installation wall is suitably secure.

Outdoor Unit – Pre-Checks

  • If you erect a canopy to protect the unit from rain and sun, DO NOT obstruct the heating dispersion for the condenser.
  • Don't keep animals or plants near the outdoor unit as the hot and cold air discharge will cause discomfort.
  • Make sure to have the distance specified in the installation manual (provided by each manufacturer) between ceiling, wall, furniture and other obstacles.
  • Do not mount near flammable gas tanks.
  • The mounting brackets/mounting plate or mounting feet for the unit must be secure, flat and level.
  • The outdoor unit must be secure, flat and level.

Installation Of The Air Conditioning System

Your chosen F-GAS registered engineer will aid you to select the best location for the indoor unit (Evaporator) and outdoor unit (Condenser) to be positioned.

You may also need to employ the services of an electrician, to supply mains power to the outdoor unit’s location. If in doubt, discuss this with your chosen air conditioning engineer.

The engineer will likely book the installation in as a half day or full day job, depending on the chosen locations and complexities of the installation.

They will usually supply all parts and sundries required to complete the job, as most systems available are only supplied with an indoor unit, an outdoor unit and a remote control. There are various extra parts required to install an air conditioning system, this can include:

  1. Brackets or Feet
  2. Pipework and Lagging
  3. Electrical Cable
  4. Trunking
  5. Condensate Pumps
  6. Fixings and Fasteners
  7. Additional Refrigerant
  8. Plus many more items, depending on the type of system(s) being installed

It is best to speak with the engineer when discussing the quote given to carry out the installation, to see what is included.

Specialist tools are required to commission an air con system which your engineer will bring with them to install you system. Systems must be strength and pressure tested and held on a vacuum for long periods of time, to ensure they are going to operate effectively as possible and eliminate the risk of leaking refrigerant into the atmosphere.

Upon completion of the installation the engineer should issue you an F-GAS Commission Certificate.

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LG Air Conditioning

LG Deluxe 3.5kW High Wall System

High Street: £1,182.00 High Street: £985.00
Our Price:
£904.99 Inc. VAT £754.16 Exc. VAT


Up to 30m²

Cooling Info


Heating Information


Energy level

Energy Rating = A++
COP = 4.1
SCOP = 4.6
EER = 3.75
SEER = 7.6

Noise level

19 - 42dB

Suitable for room sizes

Up to 30m²

Dimensions & weight

Indoor = 837 x 308 x 189 / Outdoor = 770 x 545 x 288
Indoor = 9.1kg / Outdoor = 34.1kg

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