10 Best Air Conditioner 12000 Btu in The UK

Last updated on 17/07/2025

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12000 BTU Smart WiFi A++ Easy-fit DC Inverter Wall Split Air Conditioner with 5 Meters Pipe kit - Wall Mounted Air Conditioning Unit with 5 Years Warranty

Why We Love It

Eco-friendly with A+++ rating.
Ideal for both home, offices.
Offers cooling, heating, dehumidification.

Main Highlights

Extremely energy efficient with an A+++ rating
Perfect for use in the home or large offices
3-in-1: Cooling, heating and dehumidifying
EasyFit pre-gassed with 5 m pipe and cable kit supplied as standard
Really powerful but quiet in operation

De'Longhi Pinguino PACEL98 Portable 10,700 BTU Air Conditioner with Eco Real Feel Technology, 3 in 1 Air Conditioning Unit, Rooms up to 100m³, Window Kit, A Energy Efficiency

16% Off

Why We Love It

Optimizes air quality efficiently.
Noise level control feature.
User-friendly touch controls.

Main Highlights

POWERFUL AND EFFECTIVE - Cool your home efficiently with the powerful De'Longhi 10,700 BTU portable air conditioner, Perfect for keeping your home cool during hotter days, for rooms up to 100m³
QUIET OPERATION - The optimised cooling airflow keeps the appliance operating quietly, ideal to use in any situation (47-64dB)
ENERGY EFFICIENT - De'Longhi technology ensures the best comfort level thanks to the automatic adjustment of temperature reduction and humidity control, saving up to 30% on energy consumption, Also boasting Class A Energy Efficiency rating.
EASY TO USE - Manage all functions including temperature, fan speed, timer and cooling function, Control with remote control, or use touch controls on the unit, Integrated handles and castors wheels make for easy transportation
3 IN 1 FUNCTIONALITY - Enjoy ideal comfort thanks to this multifunctional 3-in-1 unit with 3 speed settings, Separate dehumidifying function (36l/ 24 hours) for especially wet seasons or humid rooms and separate fan function to simply circulate air
WINDOW KIT INCLUDED - Window kit is included with 1.2m hose length, for easy installation
Internal test, initial condition 30° C and 40% RH

Senville LETO Series Wall Split Air Conditioner Heat Pump, Wall Mounted, 12000 BTU, Inverter, White

Why We Love It

All-season temperature solution.
Stylish air conditioning.
Comprehensive installation package.

Main Highlights

VERSATILE 4-IN-1 WALL SPLIT: Dive into an all-season solution with our wall split AC and heating system, featuring air conditioning, a robust heat pump (functional up to 5F/-15C), dehumidifier, fan, and an accelerated turbo function. Enjoy the reliability of a DC Inverter that's UL Listed, AHRI Certified.
STYLISH & FUNCTIONAL WALL SPLIT AC: Crafted for both home and business, this wall split air conditioner provides dynamic performance without compromising on aesthetics. Ideal for bedrooms, living areas, commercial spaces like stores, eateries, and warehouses.
COMPLETE INSTALLATION PACKAGE: Comes with an indoor air handler, outdoor condenser, intuitive remote control, and a comprehensive installation kit featuring a 16ft. line set and communication wire. Pre-loaded with R32 refrigerant catering up to 25 ft. A heads-up: This system mandates professional installation – it's not a DIY mini split AC.
TRUST WORTHY 5-YEAR WARRANTY: Your investment is safeguarded with our wall split heat pump's industry-leading warranty – 5 years on parts replacement and another 5 on the compressor. Benefit from the established quality of Senville, complemented by complimentary technical assistance. Labor not included.

DeLonghi PAC EM82 63 dB White

Why We Love It

Effortless room-to-room mobility.
Optimizes air purity.
Smart energy-efficient cooling.

Main Highlights

Cooling, Fan and Dehumidifying functions
Energy Efficiency Class: A
Great for bedrooms and living spaces
3 fan speeds for optimal cooling
Highly Portable and easy to use

Denwood Portable Air Conditioner 12000 BTU 4-in-1 Air Conditioning Unit Fan & Cooling Heating Dehumidifier Remote control with 24Hr Timer Dual Window kit Included with Class A Energy Efficiency Rating

Why We Love It

Powerful cooling for any space.
Versatile 4-in-1 functionality included.
Eco-friendly and cost-efficient refrigerant.

Main Highlights

【POWERFUL 12000BTU COOLING】 Belaco Air Conditioner of 12,000 BTUs, delivers an immediate cooling in your Home, Bedroom, Cabin, Office, Living Room, Kitchen. The Portable Air Conditioners gives 9000BTU power on speed 1 and 12000BTU power on speed 2 which is ideal for space up to 300 square feet.
【4-IN-1 FEATURES】 The Belaco portable air conditioning has 4 multipurpose features modes which is including NIGHT MODE, COOLING MODE, HEATING MODE, DEHUMIDIGYING MODE, 2 SPEED FAN MODE which will give you full control on your preferences.
【DUAL WINDOW KIT & WINDOW SEAL】 This Air Conditioner includes EASTY TO INSTALL ventilating kit for all kinds of window, Comes with a dual window kit for slide window, single/double hunged window & window seal for hinged windows.
【NIGHT MODE】 Push the NIGHT key on the remote control or press both the timer and down buttons on the control panel at the same time to activate. In Night mode, the target temperature will add automatically by 1℃ by 2 hours and the fan speed will change to low speed, which prevents catching cold at night.
【ECO FREINDLY REFRIGERANT】 This Air conditioner comes with R290 refrigerant which is Class A energy efficiency rating and eco-friendly. thanks to the R290 eco-friendly refrigerant, It will keep you cool during the heatwave and will save your running cost.
【REMOTE CONTROL & DIGITAL DISPLAY】This Air conditioner comes with remote control which gives you peace of mind using it while you are relaxing in your couch. The AC has DIGITAL DISPLAY which gives you full control of options you prefer.
【24HR TIMER FUNCTION】 For your peace of mind this air conditioner comes with built-in timer function which allows you to set the AC to run up to 24hrs and time adjustment span is 1 hr.

EMtronics EMAC12KW 12,000BTU Portable Air Conditioner, Dehumidifier and Cooling Fan with Remote Control, 24 Hour Timer and Air Con Window Vent Kit - White

3% Off

Why We Love It

Customizable comfort settings.
Powerful cooling performance.
Convenient remote operation.

Main Highlights

THREE OPERATION MODES: Choose from Air Condition, Dehumidify or Fan Mode. Each mode allows you to choose your level of comfort. Air Conditioning mode will fill your room with cold air and remove hot air at the same time. If you don't want cool air, just simply use the Fan mode to circulate the air in your room. Whilst the Dehumidifier mode will help you remove the unwanted moisture in the air.
ENHANCED COOLING: The EMtronics Portable Air Conditioner really does pack a punch, with its 12,000BTU cooling power, it has greater cooling performance to produce ice cold air and has a cooling range of 16 to 31 degrees, which means you'll never be too hot. This Air conditioner, can cool rooms up to 51 sqm in size.
LED DISPLAY AND REMOTE CONTROL: Sit back and relax and use the remote to control the Air Conditioner, also featuring an LED display and Lights to show which mode you have the unit in.
WINDOW VENT KIT: Use the fabric window vent kit to ensure the hot exhaust air escape the room to make the Air Con perform better. The Sealing kit also stops unwanted hot air entering your room from outside, creating the perfect atmosphere.
TIMER AND SLEEP MODE: Pop the Air Conditioner on before you go to bed and select the timer settings to let the machine turn off by itself. The Sleep mode makes the cooler kick into a quiet setting whilst your falling asleep.

BLU12 12,000BTU Portable Air Conditioner, Heating, Cooling, Dehumidification and Fan, Remote Control, Window Sheet for UK Windows Included, for Rooms Up to 30 Square Metres

Why We Love It

Versatile all-year appliance.
Eco-friendly with energy savings.
Self-evaporating, maintenance-free operation.

Main Highlights

4-in1 Multi Functional: Portable air conditioning unit with cooling, heating, fan and dehumidifier function, complete with 1.5m expandable exhaust hose included. The BLU12HP 12,000 BTU portable air conditioner delivers an instant cooling relief for your home or work place. It can be used all year round due to it's heating and dehumidifying function.
New R290 Refrigerant: uses natural high efficiency R290, which has no greenhouse emissions. The natural refrigerant is non-toxic, eco friendly and also offers energy savings. Already respecting the 2020 requirements you can be sure you are purchasing an air conditioning unit which already complies and will last you very many years, unlike air conditioning units that still use polluting gases.
Self Evaporating Function: Reduces the need to regularly empty the water tank as the unit recycles approximately half of the condensed water and uses it to cool off the inner cooling coils, which allows the unit to run more efficiently. It then disperses, or evaporates, the remaining water, along with the hot air, via the hot air duct. This cuts out any unnecessary water collecting inside the unit or in an outside container.
Complimentary Window Sheet, Remote Control with LED Display to switch between Modes, Set Temperature & View °F & °C. Easy-roll omnidirectional casters help you move your "BLU12HP" wherever it is needed most. Sound Pressure Level 49 - 53 dB(A). Sound Power Level 62 - 64dBA. PLEASE NOTE: The BLU12 does NOT have a swing function. It is designed to cool down spaces by distributing air evenly without the need to have a swing function.

Prem-I-Air 4-in-1 Portable Mobile Air Conditioner, 12000 BTU – Air Cooling, Dehumidifier, Fan, Auto Mode, Long Exhaust Hose, Remote, Timer, 2 Window Venting Kits, Dust Cover Cover, Energy A

Why We Love It

Impressive 12000 BTU cooling power.
Convenient remote control functioning.
Ease of setup and utilization.

Main Highlights

KEEP COOL WITH AN IMPRESSIVE 12000 BTU AIR CONDITIONER: Gives out a massive 12000 BTU of cooling to make those long hot days and night a little more bearable which a fan just can not match.
Digital Display & Remote Control : The air conditioner's user-friendly digital LED display and convenient wireless remote control provide you with complete command over all operating modes, including auto, cooling, and sleep. Additionally, it features a built-in 24-hour on/off timer and adjustable thermostat temperature control (in °C & °F).
Digital Display & Remote Control : The air conditioner's user-friendly digital LED display and convenient wireless remote control provide you with complete command over all operating modes, including auto, cooling, and sleep. Additionally, it features a built-in 24-hour on/off timer and adjustable thermostat temperature control (in °C & °F).
Energy Efficient Air Conditioner: Featuring a Class A Energy Efficiency rating, this A/C unit ensures cost-effective cooling even during the hottest summer days. It uses R290 refrigerant, which is up to 690 times more eco-friendly than traditional air conditioning gases. The advanced sleep mode keeps you comfortably cool while minimizing overnight energy consumption.
Energy Efficient Air Conditioner: Featuring a Class A Energy Efficiency rating, this A/C unit ensures cost-effective cooling even during the hottest summer days. It uses R290 refrigerant, which is up to 690 times more eco-friendly than traditional air conditioning gases. The advanced sleep mode keeps you comfortably cool while minimizing overnight energy consumption.
Window Kits Included: This air conditioner comes with two easy-to-install window venting kits, making it compatible with both sliding and hinged windows. The step-by-step instructions ensure a hassle-free setup. Its space-saving design guarantees minimal intrusion into your living space.
4 Useful Modes: This portable air conditioning unit offers four versatile operating modes: Air con, Air con with timer, fan only cooling and dehumidifying. The automatic oscillation mode allows you to direct airflow across a wide area or in a precise direction.
PREM-I–AIR: OVER 40 YEARS: Explore the Prem-I-AIR cooling range which includes powerful 8000, 12000 and 14000BTU units

BLACK+DECKER BXAC40008GB Portable 3-in-1 Air Conditioner with 24-Hour Timer, Remote Control, 12,000 BTU, White

34% OffFree Shipping

Why We Love It

Versatile 3-in-1 functionality.
Eco-friendly with powerful output.
Quiet sleep mode available.

Main Highlights

3-IN-1 FUNCTIONALITY: 3 operating modes provide high-performance air conditioning, dehumidifying and cooling for large rooms up to 24m2 for a comfortable, healthy home all year round
POWERFUL 12,000 BTU OUTPUT: Class A Energy Efficiency for low environmental impact, whilst providing optimum performance at low running costs
3.4KW POWERFUL COOLING: High, medium and low wind speeds deliver a strong, cool breeze to ensure comfort in hot rooms. Its low cool setting produces just 53dB to reduce noise disruption, ideal on warmer summer nights for a comfortable sleep
POWERFUL DEHUMIDIFYING: High performance technology removes excess moisture to prevent damp, mould and mildew from forming in rooms, closets and wardrobes. The large 1.5L water tray is designed to extract up to 40 litres of unwanted moisture per day, with a self-evaporating system to empty collected water
2 YEAR GUARANTEE: Assured BLACK+DECKER quality with a 2 year guarantee for added peace of mind

ALLAIR Portable Air Conditioner 3-IN-1 12000 BTU, Dehumidifier, Cooling Fan - WiFi Smart APP, Weekly Timer, Cooling in 10 Minutes,Temperature 17°C - 35°C, Remote Control and Accessories Included

Why We Love It

Effective cooling capacity.
Smartphone app integration.
Energy-efficient design.

Main Highlights

POWERFUL AIR CONDITIONER: 12,000 BTU cooling power ensures effective cooling down to 17°C in rooms up to 26 square metres. This makes it ideal for use in places such as offices, gyms, shops and homes. This unit has a fan setting and also a dehumidifying function which is capable of extracting up to 3.5L per hour. A 70° Oscillating Swing feature is included on this model which efficiently moves the cool air around the room.
CONTROL THROUGH WI-FI: Connect your smartphone to the Air Conditioner through the Nethome Plus app for ultimate control. This allows you to set the temperature, timer and other functions from the comfort of your phone. This unit is also voice-command enabled and is compatible with Amazon Alexa and Google Home for iPhone and Android (Please note that voice commands can only adjust the power and temperature settings).
ENERGY EFFICIENT: This product is economical to run and has a Class A energy efficiency rating. This is due to its low power consumption and its use of R290 refrigerant, which is cheaper and more eco-friendly than other air conditioning gasses.
KEY FEATURES: There are three speed options to choose from (high, low & sleep) as well as a thermostat that ranges from 17-35°C. There is a 24-hour timer (set in 30 minute increments) that can be controlled through the touch control panel or the remote control. The compact and portable design features castors (wheels) for easy mobility. A window seal kit and water pipe are included with this product. Please note this product requires external ventilation.
DIMENSIONS: Product Size: 46.7cm x 39.7cm x 76.5cm (32.5kg). Carton Size: 51.2cm x 44.2cm x 88cm (36.2kg).

8.9

Excellent

We scanned 969 products

We reviewed these offers relevant to the Air Conditioner 12000 Btu within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Electriq, De'Longhi, Senville, Generic, EMtronics, BLU, Prem-i-air, BLACK+DECKER, ALL AIR, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Air Conditioner 12000 Btu in the market, we considered we took a deep dive into 4846 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is 12000 BTU Smart WiFi A++ Easy-fit DC Inverter Wall Split Air Conditioner with 5 Meters Pipe kit - Wall Mounted Air Conditioning Unit with 5 Years Warranty. We love many things about this product by Electriq. What sets it apart from the competition is Eco-friendly with A+++ rating. , Ideal for both home, offices, Offers cooling, heating, dehumidification.
The best value product for most shoppers and where user satisfaction is continuously the highest is De'Longhi Pinguino PACEL98 Portable 10,700 BTU Air Conditioner with Eco Real Feel Technology, 3 in 1 Air Conditioning Unit, Rooms up to 100m³, Window Kit, A Energy Efficiency by De'Longhi based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Air Conditioner 12000 Btu and the best cost-to-value ratio is BLACK+DECKER BXAC40008GB Portable 3-in-1 Air Conditioner with 24-Hour Timer, Remote Control, 12,000 BTU, Whiteat BLACK+DECKER with a 34% discount.
Our list of the best Air Conditioner 12000 Btu is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Air Conditioner 12000 Btu in The UK

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We scanned 969 products

We concluded that: