The details
Fast and powerful cooling & heating: Stay comfortable in any season with the DUAL Inverter compressor, which delivers fast, efficient cooling in summer and reliable heating in winter—even in extreme weather.
Control your energy consumption: Perfect for limiting the maximum energy usage when there are less people in the house. Use LG Active Energy Control to adjust power usage to 80%, 60%, or 40% at the touch of a button—helping to lower electricity bills without compromising comfort.
Control from anywhere with LG ThinQ: With LG ThinQ, you can adjust temperature settings, monitor energy use, and set schedules from anywhere using your smartphone via Wi-Fi.
R32 – Highly efficient ecological refrigerant: The R32 refrigerant cools faster, is more energy-efficient, and has a lower environmental impact compared to older refrigerants - helping you stay comfortable while being kinder to the planet.
Automatic internal cleaning: The automatic internal cleaning function prevents bacteria and mould buildup on the heat exchanger, keeping your air fresh, reducing maintenance, and extending the unit’s lifespan.
Sleep-friendly comfort: Enjoy uninterrupted rest with automated sleep mode, which gradually adjusts the temperature overnight to match your body’s natural cooling cycle—keeping you comfortable while saving energy.
Quick and easy installation: LG air conditioners are designed for simpler and more efficient installation, regardless of the environment and the number of people participating in the installation process. By reducing the labor and time required for installation, it's now possible to install more air conditioners in more homes in less time.
Built-in heat pump ensures a pleasant temperature throughout the year: Stay warm in winter and cool in summer with low energy consumption—just 1.56 kW for cooling and 1.61 kW for heating. With an A++ cooling and A+ heating rating, you can enjoy comfort while keeping energy costs down.
Quiet operation: With noise levels as low as 31 dBA, this air con runs quietly, ensuring a peaceful environment whether you’re working, relaxing, or sleeping.
Essential info
- Power Supply: 220-240V~ 50Hz, 1Ph
- Indoor Dimensions (L*W*H) (CM): 99×21×34
- Indoor Net Weight : 12kg
- Outdoor Dimensions (L*W*H) (CM): 77×29×54
- Outdoor Net Weight : 34kg
- Rated Airflow Indoor (m3/h) : 1110
More info
- Nominal power in cooling (W): 50000 - 18000 BTU
- Max. Cooling Power (W): 55000 - 18700 BTU
- Nominal power in heating (W): 58000 - 19800 BTU
- Max. Heating Power (W): 64000 - 21800 BTU
- Cooling Energy Consumption (W):1560
- Heating energy consumption (W): 1610
- SEER in Cooling: 7.0 (A++)
- SCOP in Heating: 4.3 (A++)
- Copper Pipe Type length Max.: 20m
- Refrigerant type: R32
- Liquid pipe diameter: 1/4
- Gas pipe diameter: 1/2
- Sound pressure for indoor unit (dB(A)): 31
- Sound pressure for outdoor unit (dB(A)): 53
- Energy Class: Cooling/ Heating : A++/A+
- ThinQ (Wi-Fi): Yes
- Dual Inverter Compressor
- Cooling, Heating, purifying & Dehumidifying
- Quick and Easy installation
- Energy Saving Dual Inverter Technology
- Heat Pump for efficient heating
- Ultra-Quiet Operation
- Digital Led temperature and function display
- 24 Hour Timer
- Self-diagnostic function
- Silent Mode
- Auto Restart
- Comfort Air (Indirect Cooling)
- *S:Sleep/L: Low/M: Medium/ H: High
Tech stuff
The unit must be installed by a F-Gas qualified AC engineer. Please ensure the qualified fitter reads the user manual in full before installing.
These units contain a gas which is governed by F-Gas regulations. The gas must be handled by a qualified F-Gas personnel. Further information on the requirements and ensuring the engineer is qualified can be found at: Government Guidance
* Note: In order to reduce the Global Warming Potential, the outdoor unit footprint and provide extra energy savings; our outdoor units have a rating lower than the sum of indoor units BTU. Please note this will not affect the cooling or heating in individual rooms as those units are variable cooling inverters and they balance the cooling or heating power among the indoor units to achieve the target temperature in the shortest time. Please make sure you size the units as per our room guidance or call for tech support.
Question from Jan: Asked on 09/12/2025 I have a detached workshop the length of two single garages that can be freezing in winter and very expensive to heat and gets condensation due to use of steam irons. What unit would be recommended?
Hi,The LG S18EC A++ 18,000?BTU wall-mounted heat pump is a good option for your detached workshop if it’s around 40?m² and reasonably insulated, as it provides efficient year-round heating, cooling, and dehumidification to help reduce condensation from steam irons. However, if the space is larger, poorly insulated, or very cold in winter, you may need a higher-capacity unit or a two-head system to ensure even warmth. To maximize efficiency and reduce condensation, also insulate walls, roof, and floor, draught-proof doors and windows, and run the unit in dehumidify mode when using steam.Thanks!
Hi,The LG S18EC A++ 18,000?BTU wall-mounted heat pump is a good option for your detached workshop if it’s around 40?m² and reasonably insulated, as it provides efficient year-round heating, cooling, and dehumidification to help reduce condensation from steam irons. However, if the space is larger, poorly insulated, or very cold in winter, you may need a higher-capacity unit or a two-head system to ensure even warmth. To maximize efficiency and reduce condensation, also insulate walls, roof, and floor, draught-proof doors and windows, and run the unit in dehumidify mode when using steam.Thanks!
Question from Ryan: Asked on 20/11/2025 Hi I would like to order this , the 18000btu. Do I need to order hose also? It won't be wall mounted but is there anything else I need for the Installation? Many thanks Ryan
Hi Ryan,The LG S18EC 18,000?BTU air conditioner is a split-system unit that must be professionally wall-mounted, so it cannot be used as a floor-standing portable unit, and you would need additional components like pipes, refrigerant lines, a drain hose, and brackets for installation.Thanks!
Question from Robyn: Asked on 19/11/2025 How big of a area does it hear
Hi, The LG S18EC (18,000 BTU) can comfortably heat or cool spaces up to about 40–50 m². It’s ideal for medium-to-large rooms, depending on insulation and sunlight.
Thank you.
Question from DAVID: Asked on 16/07/2025 Is the pipework included?
Hi, apologies for any confusion.
The LG S18EC A++ 18000 BTU Smart Wall Mounted Air Conditioner with Heat Pump does not include a pipekit, you can add the size of pipekit you need from recommended accessories. Thanks!
Question from S Hubble: Asked on 13/07/2025 Hi are they pre-gas units thanks
Yes, this item is a pre-gassed unit. Both the indoor and outdoor units come pre-gassed and sealed. This design reduces installation time and simplifies the setup process. However, it's important to note that the installation must be carried out by a F-Gas qualified AC engineer, as the refrigerant used is governed by F-Gas regulations. The engineer should also ensure they read the user manual in full before proceeding with the installation.
Thanks!
Question from Mandy b: Asked on 08/06/2025 Can I fit this myself
This needs to be installed by a qualified FGAS engineer, You can find your local ones through the following links below
https://fgasregister.com/company-directory/
https://www.refcom.org.uk/refcom-register