10 Best Portable Air Conditioner 12000 Btu Silent in The UK

Last updated on 05/09/2025

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Dreo Smart 3-in-1 Portable Air Conditioner, 12000 BTU Drainage-Free Cooling AC Unit, Silent Mobile Air Conditioner for Bedroom, APP/Voice/Remote Control, 24h Timer with Fan & Dehumidifier, AC516S

6% Off

Why We Love It

Powerful 12,000 BTU cooling.
Whisper-quiet operation for comfort.
Smart app voice control features.

Main Highlights

Go Big on Cooling Power: The DREO AC516S portable air conditioner brings massive 12,000 BTU ASHRAE cooling capacity that reaches up to 14 ft. Helping you keep the comfortable temp in the sweltering summer
Drainage-free in powerful cooling when the humidify under 85%: Bring uninterrupted cold air to your room, thanks to DREO's new AC unit design, a dedicated condenser and water pump helps transfer excess water and reduces the need for drainage compared to traditional floor air conditioners
Smart Cooling at Your Fingertips: Use your favorite voice assistant (compatible with Amazon Alexa or Google Home) or the fully-featured Dreo App to control every aspect of your cooling experience, from multiple modes to fan speeds, timers and schedules, this standing AC has it all
3-in-1 Mode with Fan & Dehumidifier: Get more control of the way you cool thanks to the 3-in-1 mode including settings for cooling, dehumidifying and fan control in one, finding the ideal comfort setting is easier than ever with the DREO room air conditioner
Superb Customer Service: Our friendly customer support works around the clock to solve any issues and give you all the product guidance needed when using Dreo AC Series
Suitable window types: Sliding door windows are suitable; push-out windows are not suitable

Olsen & Smith 12000 BTU 3-in-1 Portable Air Conditioning Unit, AC Air Con Conditioner Cooler On Wheels with Cooling, Fan & Dehumidifier Functions, 24H Timer with Window Kit & Remote Control, White

8% OffFree Shipping

Why We Love It

Powerful cooling for large rooms.
Versatile year-round operation modes.
Quiet performance for restful sleep.

Main Highlights

POWERFUL 12000BTU COOLING PERFORMANCE – Perfect for cooling and ventilating larger rooms up to 550 sq ft / 50m2, such as living rooms, hallways and small offices. Achieve your desired room temperature with the built-in thermostat and a range of 16-31℃. With Class A energy efficiency, it delivers powerful performance while keeping energy consumption low, helping you stay comfortable without high electricity costs.
VERSATILE 3-IN-1 OPERATION – Features Cooling, Fan and Dehumidifier modes for year-round use. Dehumidifier mode removes excess moisture from the air (up to 1.2L/H via the included drainage hose) to prevent dampness, while three fan speeds and vertical swing mode (up/down 58°) ensure even air circulation. Auto mode regulates your unit’s operation without needing to constantly adjust the settings, while Sleep mode gradually reduces intensity and reduces noise for a restful night.
QUIET OPERATION & CUSTOMISABLE COMFORT – Operates at just 54 decibels at its highest setting, providing quiet cooling without disruption. The 24-hour timer lets you programme start and stop times to match your daily schedule and achieve improved energy efficiency day or night.
COMPACT, PORTABLE & SPACE-SAVING DESIGN – Sleek and modern design fits neatly into tight spaces without compromising power. Built-in castor wheels and side handles make it easy to move from room to room, giving you flexible, portable cooling wherever it’s needed most in your home. Features a removable washable air filter for easy cleaning and maintenance.
WINDOW KIT & REMOTE CONTROL INCLUDED – Includes two adjustable window venting kits - one for sliding windows and one for hinged windows - ensuring a secure, tool-free setup that works with most window types. Comes with an easy-to-use remote control for full access to all functions from across the room.
SPECIFICATIONS – Dimensions (WxDxH): 440 x 335 x 710 mm. Weight: 29.5kg. Power Supply: AC 220V-240V 50HZ. Power Cord Length: 1.8m. Max power consumption: 1300W. Energy Efficiency Rating: Class A. Refrigerant: R290. Air circulation / Fan airflow volume: 400m³/H.

ELECCI 4-in-1 Portable Air Conditioner - 12000 BTU Cooling/Heating for 60m² Rooms | WiFi-Enabled Dehumidifier, Heater & Fan with Compressor | All-Season Smart Climate Control

15% OffFree Shipping

Why We Love It

Highly efficient cooling and heating.
Four personalized air treatment modes.
Convenient drainage for hassle-free use.

Main Highlights

【Highly efficient in Cooling and Hot Air】 With a highly efficient compressor, this powerful air conditioner coolers is the perfect addition to any room, providing COOL AIR to a 60 square meters space and HOT AIR to a 40 square meters space, giving you a wonderful feeling in both hot and cold weather. Temperature Control Range is between 61℉ (16℃）and 90℉ (32℃), operating a variety of controls to let it be the more comfortable temperature range for the human body in different seasons.
【Powerful Four Air Treatment Mode You Need】This portable air conditioner coolers has 4 personalized function modes for you to choose from - Cooling, Heater, Dehumidify and Air Supply it also has a built-in temperature sensor that automatically adjusts the compressor operation according to the current temperature environment to reduce energy consumption.
【Super Convenient to Drain】No more frequent empting of bucket or pan for condensate. Not only does this cooler have a inner water tank, but also it can be drained through two drain holes for cooling, heating and dehumidification modes. After the drainage pipe is connected to the upper drain hose, it can drain water for cooling and heater mode, and the lower drain hose can discharge condensate for dehumidification function. More convenient to use, peace of mind.
【Humanized design-double LCD display】 This multifunctional air treatment air conditioner cooler is equipped with an easy-to-read LCD data display in the front of cooler that lets you know the operating status of the machine, which also allows you to check the temperature from a distance or from a distance in the dark, in addition, it is also designed with an intelligent control panel in the top, which allows you adjust its mode or temp as you need, with the portable remote control you can adjust the temperature.
【Low Maintainance-Safe to Use】With auto defrost function under dehumidify and cooling mode. And continuous drainage is available when working. It also can automatically detect the machine temperature and determine whether antifreeze is needed, so that the machine still has good performance when the ambient temperature is low. This is very important the compressor also has stop and start protection functions when the machine is running, maximizing the safety of use.
【Advantage in Low Noise】 There is no special sleep mode, but through intelligent detection and wind speed regulation, it can accompany you to spend a comfortable home life 24 hours a day throughout the year! When you rest on the sofa or bed, adjust the wind speed to low, the decibel value of the machine is about 50dB. When the wind speed is adjusted to run at high speed, the decibel level will increase by 60dB. Don't worry too much, it will not affect your ability to concentrate on your own business.
【Refrigerant compatibility R32】 The refrigerant compatibility of this portable air conditioner is R32/0.34kg (12OZ). relevant indices: ODP=0, GWP=2200. Its advantages are that it does not damage the ozone layer, is environment friendly, and high refrigeration efficiency, it has good safety performance (non-flammable, non-explosive, non-toxic, non-irritating, non-corrosive)
【Why can't the temperature be lowered in a large room? 】 To achieve the best cooling effect. Please be sure to connect the exhaust pipe, because the compressor will discharge heat when working, and this heat must be discharged to avoid affecting the indoor temperature. In addition, the air output of this machine is 400m³/h. When you need it to run the cooling mode in a space of 40-60 sq m, please check whether the room is relatively empty and there is no other heat source that generates heat. Under normal circumstances, it takes 30-40 minutes to cool down to the ideal value. Thank you for your understanding!

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).

Olsen & Smith 3-in-1 Portable Air Conditioning Unit, AC Air Con Conditioner Cooler On Wheels with Cooling, Fan & Dehumidifier Functions, Window Kit, 24H Timer & Remote Control (12000-BTU)

Why We Love It

Year-round versatile operation.
Quiet performance for peaceful living.
Compact and portable design.

Main Highlights

VERSATILE 3-IN-1 OPERATION – Features Cooling, Fan and Dehumidifier modes for year-round use. Dehumidifier mode removes excess moisture from the air (up to 1.2L/H via the included drainage hose) to prevent dampness, while three fan speeds and vertical swing mode (up/down 58°) ensure even air circulation. Auto mode regulates your unit’s operation without needing to constantly adjust the settings, while Sleep mode gradually reduces intensity and reduces noise for a restful night.
QUIET OPERATION & CUSTOMISABLE COMFORT – Operates at just 54 decibels at its highest setting, providing quiet cooling without disruption. The 24-hour timer lets you programme start and stop times to match your daily schedule and achieve improved energy efficiency day or night.
COMPACT, PORTABLE & SPACE-SAVING DESIGN – Sleek and modern design fits neatly into tight spaces without compromising power. Built-in castor wheels and side handles make it easy to move from room to room, giving you flexible, portable cooling wherever it’s needed most in your home. Features a removable washable air filter for easy cleaning and maintenance.
WINDOW KIT & REMOTE CONTROL INCLUDED – Includes two adjustable window venting kits - one for sliding windows and one for hinged windows - ensuring a secure, tool-free setup that works with most window types. Comes with an easy-to-use remote control for full access to all functions from across the room.

LUX AIR - KYR-35GW/LUX - 12000BTU Portable Air Conditioning Unit HEAT & COOL - Up to 35m2 Room

Why We Love It

Powerful Cooling for Large Rooms.
Smart Home Integration Capability.
Efficient Water Recycling System.

Main Highlights

12000BTU Cooling Output
Suitable for up to 30m2 rooms
UV-C Sterilisation Inside
Modern Design with Touch Panel Control
WiFi Control - SmartLife Application
Amazon Alexa & Google Assistant Compatible
24 Hour Timer Function
Recycling of Condensed Water Improves Cooling Efficiency.

Humhold 12000 BTU Portable Air Conditioner with Remote Control, 3 in 1 AC Cooling Unit with Fan and Dehumidifier, Refreshes Room Up to 500 Square Feet, Mode

Why We Love It

Powerful cooling for large spaces.
Convenient three-in-one functionality.
Easy to move and install.

Main Highlights

12000 BTU Powerful Cooling Efficiency:The Humhold powerful portable AC unit has a cooling capacity of 12,000 BTU (ASHRAE) / 8,000 BTU (SACC), has a more energy efficient compressor that can provide cold air to 46,500 square feet of large space in your living room, bedroom, home kitchen, carport. or one one one or one one Stable and efficientefficientefficientefficientefficientefficiententeficiententententententententententententententententententeenthentheentheentheentheentheentheentheentheenth-centuryeenth-twenty-twenty-twenty-twenty-twenty-twenty-twenty-eighteenth-centurienteficientMoreover, can maintain
【3 in 1 Cooling/Dehumidification/Fan Function】Smart portable air conditioner provides the convenience of 3 in 1 functions, including cooling, 3-speed fan and dehumidification, which meets your daily needs. You can freely adjust the temperature in cooling mode, from (36 °F to 70 °F) in hot weather. The capacity of the 75 pint/day dehumidifier can effectively reduce the humidity in small rooms and as a fan to circulate indoor air at all times, eliminating excess moisture and releasing fresh air for a healthy and comfortable environment.
【Front LED Display & LED Remote Control】Our self-evaporable portable AC unit comes with an easy-to-read front LED display, combined with full function remote control which has LED display and control distance up to 23 feet, you can easily adjust the temperature and wind speed you want while sitting on the sofa or lying on the bed, no need to approach or get up, maximize the comfort of mobile air conditioners.
NO NEED TO DRAIN - With built-in improved water self-evaporation system of smart AC units, no need to drain water for daily use in the home, the water vapor will automatically evaporate through the hose. However, if placed in a very humid environment such as a bathroom, laundry room, etc., it will need to be drained every 8 hours, otherwise the machine will stop if the water tank inside is full, you can disconnect the drain plug on the back and connect the household hose to drain, then turn on the machine again. It is also recommended to clean the filter every week, the filter is designed to disassemble easily without tools and can be washed directly with water.
【Smart & Sleep Mode with 24 Hour Timer to Save Energy】 With built-in internal temperature sensor, intelligent mode allows the portable AC inverter unit to work automatically in cold mode or fan mode depending on the ambient temperature, keep the single room at the most comfortable temperature of 73F-77F. The sleep mode will maintain an optimal temperature at low speed, and will provide you with less than 48dB of silent room, besides, you can preset to stop the AC unit in front of 0.5-24 hours, all these functional modes save money and allow you to have a proper temperature to relax and sleep well in the wonderful summer.
IMPROVED WIND SPEED & AUTOMATIC ROTATING - More powerful and improved built-in fan system, with 0 to 80° wide angle airflow and automatic rotation function that cools the room in all directions, the angle can be adjusted freely, and the air flows evenly throughout the room, which can distribute the cold air so as to cool the room to the fastest speed, so you can feel cold wind in any room. Home
EASY TO MOVE AND INSTALL - This floor air conditioning machine comes with four universal 360° wheels and hidden handles on both sides so you can easily move the machine to any room. The window seal kit and drain hose are included in the purchase of portable air conditioning to ensure easy installation, and fits most vertical windows and horizontal windows. Easy to install in 3 steps: first connect the seal panels to the window, secondly insert the exhaust pipe adapters to the air conditioner and window plate, thirdly connect and enjoy the cooling air.

electriQ Heavy Duty 12000 BTU Portable Commercial Air Conditioner - Metal Body

Why We Love It

Great for spacious rooms.
Multiple useful functions integrated.
Durable and easy mobility.

Main Highlights

12,000 BTU air conditioner - great for rooms up to 30 sqm
3 in 1 unit with Cooling, Fan, Dehumidifier function
2 fan speed settings, digital thermostat & 24 hours timer
Protective functions prevent damage & prolong the life of the machine
Durable metal casing, handle and lockable castors

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.

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

44% 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

8.7

Excellent

Save 44%

We scanned 1938 products

We reviewed these offers relevant to the Portable Air Conditioner 12000 Btu Silent 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 Dreo, Olsen & Smith, ELECCI, ALL AIR, LUX AIR, HUMHOLD, Electriq, EMtronics, BLACK+DECKER, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Portable Air Conditioner 12000 Btu Silent in the market, we considered we took a deep dive into 9691 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 Dreo Smart 3-in-1 Portable Air Conditioner, 12000 BTU Drainage-Free Cooling AC Unit, Silent Mobile Air Conditioner for Bedroom, APP/Voice/Remote Control, 24h Timer with Fan & Dehumidifier, AC516S. We love many things about this product by Dreo. What sets it apart from the competition is Powerful 12,000 BTU cooling. , Whisper-quiet operation for comfort. , Smart app voice control features. .
The best value product for most shoppers and where user satisfaction is continuously the highest is Olsen & Smith 12000 BTU 3-in-1 Portable Air Conditioning Unit, AC Air Con Conditioner Cooler On Wheels with Cooling, Fan & Dehumidifier Functions, 24H Timer with Window Kit & Remote Control, White by Olsen & Smith based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Portable Air Conditioner 12000 Btu Silent 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 44% discount.
Our list of the best Portable Air Conditioner 12000 Btu Silent 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 Portable Air Conditioner 12000 Btu Silent in The UK

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We scanned 1938 products

We concluded that: