10 Best 18000 BTU Wall Mounted Air Conditioner in UK 2025
Updated on 24/06/2025
#1
Recommended
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- Energy efficient A+++ rating
- Suitable for homes and large offices
- 3-in-1 functionality: cooling, heating, and dehumidifying
- Comes with EasyFit pre-gassed 5 m pipe and cable kit
- Powerful yet quiet operation
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- Energy efficient A+++ rating
- Suitable for homes and large offices
- 3-in-1 functionality: cooling, heating, and dehumidifying
- Comes with EasyFit pre-gassed 5 m pipe and cable kit
- Powerful yet quiet operation
#2
Value for Money
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- Portable air conditioner with a cooling capacity of 9,000 BTU, effective for rooms up to 300 sq.ft.
- Functions as a fan and dehumidifier, with cooling temperatures as low as 16℃ and two fan speeds to enhance indoor air circulation.
- LED digital display for real-time temperature monitoring, along with remote control for easy operation, including setting timers and adjusting modes.
- Compact design with dimensions of 38x38x87cm and weight of 25 kg, featuring casters for mobility and compatibility with sliding windows for simple installation.
- 24-hour timer for scheduled operation, energy-saving sleep mode, and user-friendly control with reduced noise at night.
- Includes essential accessories such as exhaust hose, window kit, remote control, and user manual for easy setup and use.
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- Portable air conditioner with a cooling capacity of 9,000 BTU, effective for rooms up to 300 sq.ft.
- Functions as a fan and dehumidifier, with cooling temperatures as low as 16℃ and two fan speeds to enhance indoor air circulation.
- LED digital display for real-time temperature monitoring, along with remote control for easy operation, including setting timers and adjusting modes.
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#3
9% Off
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- 9000 BTU cooling capacity suitable for spaces up to 269 square feet, offering efficient cooling.
- Four operational modes: cooling, fan, dehumidifier (operates above 15°C or below 85% humidity), and sleep mode for various comfort needs.
- Ultra-quiet operation under sleep mode with noise levels below 60 dB for minimal disturbance during rest.
- Portable design with built-in handles and 360° wheels for easy mobility; compatible window kits for simple installation without drilling.
- User-friendly controls include a 24-hour timer, remote operation, and a washable air filter for easy maintenance.
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- 9000 BTU cooling capacity suitable for spaces up to 269 square feet, offering efficient cooling.
- Four operational modes: cooling, fan, dehumidifier (operates above 15°C or below 85% humidity), and sleep mode for various comfort needs.
- Ultra-quiet operation under sleep mode with noise levels below 60 dB for minimal disturbance during rest.
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#4
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- 9000 BTU cooling capacity provides effective cooling down to 16°C, suitable for medium to large spaces such as homes and offices.
- Wi-Fi connectivity allows for remote control of the AC unit via smartphone app or voice commands; compatible with Amazon Alexa and Google Home.
- Offers four functions: air cooling, dehumidifying, fan-only, and sleep modes, controllable through the app, digital display, or remote.
- Class A Energy Efficiency rating and R290 refrigerant make this unit an environmentally friendly choice that reduces energy costs.
- Includes two easy-to-install window venting kits for both slide and hinged windows, designed for minimal space intrusion.
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- 9000 BTU cooling capacity provides effective cooling down to 16°C, suitable for medium to large spaces such as homes and offices.
- Wi-Fi connectivity allows for remote control of the AC unit via smartphone app or voice commands; compatible with Amazon Alexa and Google Home.
- Offers four functions: air cooling, dehumidifying, fan-only, and sleep modes, controllable through the app, digital display, or remote.
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#5
![Inventor Portable Air Conditioner Magic 5-1, Powerful 12000BTU Mobile AC, Heating, Dehumidifier, 3 fan speeds, Digital Display, Remote, Window Kit, 24 Hr Timer (WEE/MM0449AA) [Energy Class A]](https://m.media-amazon.com/images/I/31rbdcooKyL._SL320_.jpg)
![Inventor Portable Air Conditioner Magic 5-1, Powerful 12000BTU Mobile AC, Heating, Dehumidifier, 3 fan speeds, Digital Display, Remote, Window Kit, 24 Hr Timer (WEE/MM0449AA) [Energy Class A]](https://m.media-amazon.com/images/I/41W+Lt7O3VL._SL320_.jpg)
![Inventor Portable Air Conditioner Magic 5-1, Powerful 12000BTU Mobile AC, Heating, Dehumidifier, 3 fan speeds, Digital Display, Remote, Window Kit, 24 Hr Timer (WEE/MM0449AA) [Energy Class A]](https://m.media-amazon.com/images/I/41yy52B1NNL._SL320_.jpg)
![Inventor Portable Air Conditioner Magic 5-1, Powerful 12000BTU Mobile AC, Heating, Dehumidifier, 3 fan speeds, Digital Display, Remote, Window Kit, 24 Hr Timer (WEE/MM0449AA) [Energy Class A]](https://m.media-amazon.com/images/I/51Ij98afu9L._SL320_.jpg)
![Inventor Portable Air Conditioner Magic 5-1, Powerful 12000BTU Mobile AC, Heating, Dehumidifier, 3 fan speeds, Digital Display, Remote, Window Kit, 24 Hr Timer (WEE/MM0449AA) [Energy Class A]](https://m.media-amazon.com/images/I/31rbdcooKyL._SL100_.jpg){kind=small}
![Inventor Portable Air Conditioner Magic 5-1, Powerful 12000BTU Mobile AC, Heating, Dehumidifier, 3 fan speeds, Digital Display, Remote, Window Kit, 24 Hr Timer (WEE/MM0449AA) [Energy Class A]](https://m.media-amazon.com/images/I/41W+Lt7O3VL._SL100_.jpg)
![Inventor Portable Air Conditioner Magic 5-1, Powerful 12000BTU Mobile AC, Heating, Dehumidifier, 3 fan speeds, Digital Display, Remote, Window Kit, 24 Hr Timer (WEE/MM0449AA) [Energy Class A]](https://m.media-amazon.com/images/I/41yy52B1NNL._SL100_.jpg)
![Inventor Portable Air Conditioner Magic 5-1, Powerful 12000BTU Mobile AC, Heating, Dehumidifier, 3 fan speeds, Digital Display, Remote, Window Kit, 24 Hr Timer (WEE/MM0449AA) [Energy Class A]](https://m.media-amazon.com/images/I/51Ij98afu9L._SL100_.jpg)
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- Digital display shows real-time temperature in °F or °C, controllable via a multi-functional control panel and remote.
- 5-in-1 functionality includes cooling, heating, fan, dehumidifying, and air circulation modes to enhance comfort year-round.
- Compact design with mobile, omnidirectional casters for easy movement between rooms.
- Uses R290 refrigerant, which has a minimal environmental impact, promoting air quality without harming the ozone layer.
- Expandable exhaust hose compatible with standard window types, with adjustable length for simple installation.
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- Digital display shows real-time temperature in °F or °C, controllable via a multi-functional control panel and remote.
- 5-in-1 functionality includes cooling, heating, fan, dehumidifying, and air circulation modes to enhance comfort year-round.
- Compact design with mobile, omnidirectional casters for easy movement between rooms.
- Uses R290 refrigerant, which has a minimal environmental impact, promoting air quality without harming the ozone layer.
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#6
16% Off
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- 9000 BTU cooling capacity effectively cools rooms up to 300 sq. ft. down to 16°C.
- Four functions in one unit: COOL, DRY, FAN, and ventilation to maintain comfort and reduce humidity.
- Portable design with hidden handles and wheels for easy movement and installation in various room types.
- Equipped with a removable, washable double-layer filter to enhance air quality by trapping dust and allergens.
- User-friendly LED display and remote control for quick adjustments to settings, with a 2-year warranty for support.
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- 9000 BTU cooling capacity effectively cools rooms up to 300 sq. ft. down to 16°C.
- Four functions in one unit: COOL, DRY, FAN, and ventilation to maintain comfort and reduce humidity.
- Portable design with hidden handles and wheels for easy movement and installation in various room types.
- Equipped with a removable, washable double-layer filter to enhance air quality by trapping dust and allergens.
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#7
15% Off
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- 4-in-1 functionality combines cooling, dehumidifying, fan, and sleep modes for year-round use with two adjustable fan speeds.
- Operates quietly at 52dB and uses eco-friendly R290 refrigerant, optimizing energy efficiency and reducing electricity costs.
- Equipped with an LED display and remote control for easy temperature adjustment (16-32℃), 24-hour timer programming, and a child lock for safety.
- Features ergonomic handles and 360° casters for easy mobility; includes a window kit for quick installation in various window types (17"-53").
- Modern design with ABS frosted plastic, user-friendly control panel, and strong airflow capacity (330m³/h) suitable for spaces up to 20㎡.
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- 4-in-1 functionality combines cooling, dehumidifying, fan, and sleep modes for year-round use with two adjustable fan speeds.
- Operates quietly at 52dB and uses eco-friendly R290 refrigerant, optimizing energy efficiency and reducing electricity costs.
- Equipped with an LED display and remote control for easy temperature adjustment (16-32℃), 24-hour timer programming, and a child lock for safety.
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#8
38% Off
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- Three operating modes: air conditioning, dehumidifying, and cooling, suitable for large rooms up to 24m2.
- 12,000 BTU output with Class A Energy Efficiency for better performance and lower energy costs.
- Three adjustable wind speeds for effective cooling, with a low setting at 53dB for quiet operation.
- Advanced dehumidifying technology removes up to 40 litres of moisture per day with a 1.5L water tray and self-evaporating system.
- Included 2-year guarantee for quality assurance.
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- Three operating modes: air conditioning, dehumidifying, and cooling, suitable for large rooms up to 24m2.
- 12,000 BTU output with Class A Energy Efficiency for better performance and lower energy costs.
- Three adjustable wind speeds for effective cooling, with a low setting at 53dB for quiet operation.
- Advanced dehumidifying technology removes up to 40 litres of moisture per day with a 1.5L water tray and self-evaporating system.
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#9
5% Off
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- Cooling capacity of 140,000 BTUs with 400 m³/h airflow cools rooms to a comfortable temperature (26℃) in 10 minutes, suitable for various spaces.
- Top air vent features auto swing with adjustable baffle angle (30°-87°) to enhance comfort by preventing direct cold airflow.
- Uses condensation self-evaporation technology to eliminate water during operation, improving cooling efficiency and prolonging the unit's lifespan.
- Sleep mode automatically adjusts temperature and dims lights to enhance comfort during the night, with gradual temperature increases.
- Functions as a 3-in-1 unit for cooling, dehumidifying, and fan operations, with three speed settings for customizable airflow.
- Designed for easy mobility with hidden handles and casters; includes all necessary installation accessories and clear instructions.
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- Cooling capacity of 140,000 BTUs with 400 m³/h airflow cools rooms to a comfortable temperature (26℃) in 10 minutes, suitable for various spaces.
- Top air vent features auto swing with adjustable baffle angle (30°-87°) to enhance comfort by preventing direct cold airflow.
- Uses condensation self-evaporation technology to eliminate water during operation, improving cooling efficiency and prolonging the unit's lifespan.
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#10
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- Honeywell 7000 BTU 3-in-1 air conditioner provides effective cooling, dehumidification, and air circulation for year-round comfort.
- Features a user-friendly LCD display and remote control for easy operation, along with four smooth-rolling casters for easy portability.
- Includes thermal protection and heat-safe internal casing for added safety during operation.
- Equipped with a washable filter to trap dust and extend the unit's lifespan, along with an adjustable window kit for installation.
- Manufactured by Honeywell, ensuring quality and reliability, backed by a 2-year warranty.
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- Honeywell 7000 BTU 3-in-1 air conditioner provides effective cooling, dehumidification, and air circulation for year-round comfort.
- Features a user-friendly LCD display and remote control for easy operation, along with four smooth-rolling casters for easy portability.
- Includes thermal protection and heat-safe internal casing for added safety during operation.
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![Daewoo 5000 BTU Portable 3-in-1 Air Conditioning Unit with LED Display, Remote Control, 24hr Timer, 2 Fan Speed Settings for Home/Small Office [Energy Class A]](https://m.media-amazon.com/images/I/31LKe6+i3gL._SL320_.jpg)
![Daewoo 5000 BTU Portable 3-in-1 Air Conditioning Unit with LED Display, Remote Control, 24hr Timer, 2 Fan Speed Settings for Home/Small Office [Energy Class A]](https://m.media-amazon.com/images/I/31HLIMMwk9L._SL320_.jpg)
![Daewoo 5000 BTU Portable 3-in-1 Air Conditioning Unit with LED Display, Remote Control, 24hr Timer, 2 Fan Speed Settings for Home/Small Office [Energy Class A]](https://m.media-amazon.com/images/I/41QAD+6VYJL._SL320_.jpg)
![Daewoo 5000 BTU Portable 3-in-1 Air Conditioning Unit with LED Display, Remote Control, 24hr Timer, 2 Fan Speed Settings for Home/Small Office [Energy Class A]](https://m.media-amazon.com/images/I/41tY9o9RXmL._SL320_.jpg)
