10 Best Quiet Portable Air Conditioning Unit in The UK

Last updated on 05/05/2025

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Bosch Cool 5000 with Inverter Technology Portable AC - 3-in-1: Air Conditioner, Dehumidifier, Fan - 3.4 kW for Rooms of up to 46 m² - With Auto Mode, Silent Mode & Sleep Mode

Why We Love It

Energy-efficient and powerful cooling.
Whisper-quiet operation at 44 dB.
Easy control with pre-programmed modes.

Main Highlights

Powerful cooling (3.4 kW) is now also energy-efficient (A+, 1 kWh/h) and quiet (44 dB(A)) thanks to the Inverter Technology of the Bosch Cool 5000
Save up to 30% energy*: The Bosch Cool 5000 mobile air conditioner efficiently cools rooms up to 46 m² in size and consumes up to 30% less energy (*compared to mobile air conditioners without Inverter Technology)
Quiet at last: Thanks to the Inverter Technology, the Bosch Cool 5000 is pleasantly quietly at just 44 dB(A) and without annoying start-stop noises
Bosch Easy Cool Select: Thanks to the pre-programmed modes (Auto mode, Silent mode, Sleep mode), you can select the right setting for your everyday situation with just one click
Easy to transport and operate: The integrated hose enables easy handling and compact storage. The air conditioner can be controlled via the self-explanatory LED soft-touch display or the remote control with integrated timer

Dreo Smart 3-in-1 Portable Air Conditioner, 12000 BTU Drainage-Free Cooling AC Unit, 46dB Silent Mobile Air Conditioners for Bedroom & Room, APP/Voice/Remote Control, 24h Timer with Fan & Dehumidifier

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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
Isolate Noise, Amplify Comfort: Featuring a new noise isolation system around the compresor, this portable air conditioners reduces noise down to a minimum 46dB, making it ideal for quiet places like bedrooms and offices
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
Hassle-free DIY Installation with Universal Window Kits: Don't worry about the window type or size, this air conditioner for bedrooms features multiple panel combinations that are easy to fit and secure on any window (from 17" to 53")
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

Pro Breeze 4-in-1 Portable Air Conditioner 9000 BTU – Smart Home WiFi Compatible - 24 Hour Timer & Window Venting Kit Included. Powerful Air Conditioning Unit with Class A Energy Efficiency Rating

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Why We Love It

Powerful cooling capacity.
Smart home integration.
Energy-saving design.

Main Highlights

POWERFUL COOLING This portable air conditioner features 9000 BTU of cooling capacity, allowing for strong and effective cooling down to 16°C in medium to large homes, living rooms, bedrooms and offices
SMART HOME TECHNOLOGY WITH WI-FI: Connect your smartphone to the AC unit and control the air conditioners temperature, 24 hour timer and various air con functions through the app or voice command. Compatible with Amazon Alexa and Google Home for iPhone and Android.
4-IN-1 FEATURES WITH DIGITAL DISPLAY: This portable air conditioning unit features 4 multi-purpose operating modes including air cooling, dehumidifying, fan only and sleep modes all of which can be controlled via the air conditioner smart app, digital display or remote control.
ENERGY EFFICIENT AIR CONDITIONER: This A/C unit boasts a Class A Energy Efficiency rating to ensure that keeping cool in the sweltering summer heat is cost effective. It also utilises an R290 refrigerant, up to 690 times more eco-friendly than traditional air conditioning gasses.
WINDOW KITS INCLUDED: We have included two easy-to-install air conditioner window venting kits with our AC unit to fit either slide or hinged windows using the step by step instructions provided. Its space-saving design also ensures minimal intrusion.
PRO BREEZE – THE AIR COOLING EXPERTS: Explore the Pro Breeze cooling range which includes powerful 7000, 9000 and 12000BTU Air Conditioners, 5L and 10L Evaporative Coolers along with a vast range of innovative Tower and Pedestal Fans. Fancy a refreshingly cold drink? Search for the Pro Breeze Ice Maker!

De'Longhi Pinguino Compact PACES72 Classic Compact Portable 8,300 BTU Air Conditioner, 3 in 1 Air Conditioning Unit, Rooms up to 60m³, A Energy Efficiency, Window Kit Included, Energy Class A, White

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Why We Love It

Efficient cooling for large spaces.
Saves energy, reduces costs.
Convenient remote and timer features.

Main Highlights

COMPACT COOLING - Pinguino Compact is a 8,300 BTU powerful cooling solution for living rooms, bedrooms and offices up to 60m³
QUIETER COOLING - Pinguino Compact has a 50% noise reduction from max to min speed
ENERGY EFFICIENT - Class A Energy Efficiency rating, Refrigerant gas R290, which is up to 696 times more environmentally friendly than traditional gases (696 times compared to the impact of Global Warming of R410 - F-Gas Reg. 517/2014)
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 2 speed settings, Separate dehumidifying function (21l/ 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 1.5m hose length, for easy installation
WINDOW KIT & CASTOR WHEELS - Window kit is included with 1.2m hose length, for easy installation, Easily move your air conditioner to the room of your choice with ease thanks to the integrated handles and castor wheels for easy portability

Air Conditioning Unit - Portable Air Conditioner 9000 BTU, 4-in-1 Energy Efficient Cooling & Dehumidifier, Quiet Operation, Digital Display, Window Kit, 24-Hour Timer, Covers Up to 215 sq.ft (20㎡)

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Why We Love It

Versatile year-round climate control.
Whisper-quiet energy-efficient operation.
Easy to move and install.

Main Highlights

🌀【4-IN-1 MULTIFUNCTIONAL DESIGN】: This portable air conditioning unit integrates cooling, dehumidifying, fan, and sleep modes to meet year-round needs. With 2 fan speeds, it ensures optimal comfort in various environments. Whether it's a hot summer or a humid rainy season, this air conditioner can handle it all with ease, providing a comfortable indoor climate whenever you need it.
🌍【ENERGY-EFFICIENT & ULTRA-QUIET OPERATION】: Powered by a GMCC compressor, this portable air conditioner operates at a noise level as low as 52dB, making it perfect for bedrooms and offices. The R290 eco-friendly refrigerant and Class A energy efficiency rating not only reduce environmental impact but also help you save on electricity costs, making it a smart and sustainable choice.
🎮【SMART CONTROL & USER-FRIENDLY OPERATION】: Featuring an LED display and remote control, this air conditioning unit portable allows you to easily adjust the temperature (16-32℃), set the 24-hour timer, and monitor the water-full indicator. The child lock function ensures the safety of children and pets, making it a reliable and family-friendly appliance.
🏡【EASY INSTALLATION & EFFORTLESS MOBILITY】: Designed with built-in handles and 360° casters, this portable AC air conditioner can be moved effortlessly between rooms. The included window kit is compatible with horizontal and vertical sliding windows (17"-53"), enabling quick and tool-free installation. Whether it's your living room, bedroom, or office, this unit adapts seamlessly to different spaces, providing cooling wherever you need it.
💎【2025 UPGRADED DESIGN WITH STYLISH LOOK】: This air conditioner unit portable features a sleek, upgraded design with ABS frosted plastic for a premium feel. The intuitive control panel and clear display enhance usability, while the powerful airflow of 330m³/h ensures rapid cooling for rooms up to 20㎡. Enjoy a comfortable and refreshing environment in no time with this modern and efficient cooling solution.

Maxesla Air Conditioning Unit, Portable Air Conditioner 9000 BTU 4-in-1 Dehumidifier, Cooling Fan with 3 Speeds, Digital Display & Remote Control, Window Kit, 24 Hour Timer for Room Up to 215 ft

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Why We Love It

Cools rooms up to 215ft.
4-in-1 multiple functionalities.
Whisper-quiet sleep mode.

Main Highlights

9000BTU Cooling Up to 215ft: Our air conditioner is crafted with a cutting-edge air compressor, making itself an exquisite and compact cooling tool. Stay cool and cozy with our 9000 BTU air conditioner, a preferred companion cooling the rooms up to 215ft instantly. Start your unforgettable cooling journey in bedroom, living room, office or garage from now on.
4-in-1 Multiple Functions: Our air conditioner is designed specially to improve indoor air and offer year-round comfort. Beat the heat with our versatile air conditioner boasting four modes tailored for your comfort. From chilling in air conditioner mode to enjoying gentle breezes or strong cool winds in fan mode, and maintaining optimal humidity at 40%-60% RH with the dehumidifier mode ( This mode only works when the temperature is above 15℃ or the humidity is below 85% . ), and enjoying a deep ultra-quiet childlike sleep with light off and lower noise under our sleep mode, our air conditioner has you covered.
Guard Your Tranquil Slumber: Enjoy whisper-quiet serenity with our ultra-quiet air conditioner. Our air conditioner is equipped with a high-quality air compressor and multi-layer cottons, serving as indispensable noise-reducing parts. Drift off into a tranquil slumber under sleep mode with light off and lower noise. Immerse yourself in a childlike sleep under our sleep mode's gentle hum below 54 dB, ensuring a ultra-quiet undisturbed rest every time.
Smooth Move & Effortless Assembly: This air conditioner is designed with two built-in handles and four 360° casters for room-to-room mobility effortlessly in bedroom, office or in the cabin around your home. We offer window kits that are compatible with most sliding windows, catering you an effortless installment without drilling. And our unique plug design behind simplifies storage and transportation of the air conditioner.
User-Friendly Design: Take control of your comfort with our 24h timer and versatile control options. Set your ideal temperature and mode effortlessly with our knob switch or remote control. Choose startup and shutoff time to submerge yourself in cool air once getting into the room, greatly saving the energy. It is recommended to activate the child lock to keep little ones and pets safe from harm when the air conditioner is in operation. And with a washable air filter that can be washable and reused, maintenance for our air conditioner is a breeze. We recommend cleaning the air filter twice a month to ensure peak performance and cooling efficiency.

Air Conditioning Unit, 9000 BTU Portable Air Conditioner with 3-in-1 Cooling & Fan & Dehumidifier Functio, Air Conditioners with Digital Display & Remote Control, 24H Timer for Room Up to 300 ft

15% OffFree Shipping

Why We Love It

Powerful and efficient cooling.
Remote control for convenience.
Humanized design with schedules.

Main Highlights

Powerful 9000 Btu Cooling: This air conditioning unit utilizes an advanced air compressor, delivering powerful cooling with 9000 BTU capacity, suitable for rooms up to 300 square feet. Whether it's your home, bedroom, basement, office, living room, or kitchen, it ensures powerful and efficient cooling. In the scorching summer, it can quickly cool down the temperature to 16°C within 10 minutes, keeping you cool and comfortable. It is an essential tool to beat the heat
Real-Time Display And Remote Control: Equipped with a multifunctional control panel featuring an LED digital display and comprehensive remote control, this air conditioner offers real-time temperature monitoring and remote operation, enhancing the convenience of your lifestyle. With the remote control, you can effortlessly set timers, adjust temperature settings, and switch between modes for an unparalleled cooling experience
3-In-1 Features: Do you remember those unbearable moments of scorching heat during summer? Our multi-functional air conditioner is specially designed to improve your room environment with 3 basic modes. Cooling mode brings you coolness in hot weather. Fan mode provides gentle or strong airflow as desired; Dehumidifier mode effectively removes moisture from the air, maintaining room humidity between 40% and 60%. You can customize your cooling experience according to your preferences
Portable And Hassle-Free Installation: With its space-saving design and durable omnidirectional casters, along with invisible side handles, this air conditioning enables effortless mobility from one room to another. Also, our air conditioners come with an easy-to-install window venting kit compatible with most sliding windows and require no drilling for even more convenient installation. The plug storage area on the back is designed to make storage more convenient
Humanized Design: 24-hour on/off timer offers customizable cooling schedules for both day and night, helping you save energy. The thoughtful sleep mode dims the LED lights and reduces noise, providing a quiet and comfortable sleeping environment. For families with infants or pets, the child lock function ensures worry-free use

9000 BTU Portable Air Conditioners, 3 in 1 Air Conditioning Unit Portable, Dehumidifier & Fan Modes, Remote Control, 24H Timer, Sleep Mode, Window Exhaust Kit Includes, Mobile Unit for Home and Office

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Why We Love It

Powerful 9000BTU cooling capacity.
Versatile 3-in-1 functionality available.
Easy installation without extra tools.

Main Highlights

9000BTU Powerful Cooling: Equipped with an energy-efficient and powerful compressor, LEENON portable air conditioners provides 9000BTU cooling power, quickly cooling spaces up to 370 sq.ft,perfect for bedrooms, living rooms, kitchens and other small-to-medium residential spaces, our air conditioner ensure that your room stays at a comfortable temperature of between 17 ~ 30 °C even on the hottest days.
3-in-1 Cooling/Dehumidifier/Fan Mode: LEENON portable air conditioner unit featurs cooling, fan, and dehumidifier modes in one all. As a dehumidifier,it emoves excess moisture from the air in high humidity areas; 2-speed fan mode creates a circulation of fresh air throughout your room. An energy-saving sleep mode that auto goes at a lower fan and airconditioner gradually increases the temperature to conserve energy and keep you comfortable at night.
[Easy Installation with Included Windows Kit:] Window panel kit and large exhaust hose are included, hassle-free to install without extra screws and tools; Air conditioning unit fits 83~ 120cm sliding windows and single/double hung windows. In dehumidifier mode, please connect the drain hose on upper back drain outlet to continuously drain the collected water; and drain hose installed on drain outlet at the bottom in cooling mode.
Simple Operation and 24H Timmer: LEENON mobile air conditioners offers a multifunctional control panel or remote control for effortless operation. Easily adjust cooling modes, temperatures (17 to 30 degrees Celsius), fan speeds etc.(Humidity is kept at a comfortable level by default Cannot be adjusted).Our room air conditioners have a 24-hour timer function, which allows you to freely set the cooling time to help keep your room cool and avoid wasting energy.
Portability and Easy to Clean: Measuring 34x37x68 cm, LEENON 9000 BTU air conditioner is designed for portability, 4Pcs roll casters wheels and side handles allows you easily move airconditioner between rooms. The air filter is easily removable for easy cleaning. In addition, this air conditioner A-rated for energy efficiency and uses eco-friendly R290 refrigerant for a greener cooling solution.Please note that do regularly clean the air filter.
Reliable Customer Service: LEENON Offers satisfied customer service.If you have any problem with air conditioner unit or are not completely satisfied, please contact us directly, and we will respond within 12 hours.

DR.PREPARE 9000 BTU Air Conditioning Unit, 4-in-1 Portable Air Conditioner with Remote Control, Dehumidifier, Cooling Fan with 2 Speeds, 24H Timer & Sleep Mode, Child Lock, Dual Window Venting Kit

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Why We Love It

Portable and easy to move.
Fits most window types.
Offers intelligent sleep mode.

Main Highlights

[4-in-1 Portable Air Conditioner] In cool mode, it provides powerful cooling for rooms up to 30 sq. m, with a temperature range of 16℃~32℃. Ideal for hot summers and spaces with poor ventilation. Sleep mode, available only in cooling mode, maintains a quiet 45dB noise level for a peaceful night's sleep. Use fan mode for air circulation, and dehumidifier mode for removing up to 24.1L of humidity per day, perfect for damp or rainy days.
[Fits Most Window Types] Don't worry about your window type with Dr.Prepare's air conditioning unit. It includes two types of installation accessories: the window bracket kit fits horizontal or vertical sliding windows (from 25.6'' to 50''), while the window seal kit works for push outward, pull inward, casement, awning, and skylight windows (up to 157'').
[Intelligent Sleep Mode] When you activate sleep mode, the air conditioning unit will auto switch to low-speed operation, reducing noise levels to a quiet 45 dB. The LED panel indicator brightness will dim to 50%, providing less light for a better night's sleep. Plus, the temperature will increase by 1℃ after the first hour and then another 1℃ after the second hour, maintaining this level until the end. This intelligent temperature adjustment can help save up to 10% on your energy bill.
[Effortless Control] Our portable air conditioner features an easy-to-read LED display and includes a compact remote control (AAA batteries not included) to easily set the time, temperature, and mode. Its 1-24 hour adjustable timer allows you to set the ON/OFF schedule and let the AC work, no need to be at home.
[Easy to Move, Use & Maintain] This portable air conditioner features four easy-roll casters and two side handles for effortless room-to-room movement. The removable, washable, and reusable mesh ensures clean and healthy cooling air, protecting your family from dust and pet dander. Its memory function retains your previous mode and temperature settings, and it auto-restarts when power is restored, except in cases of manual power outages.

Emperial Air Conditioner 9000 BTU, 4-in-1 Portable Air Conditioning Unit, Dehumidifier, Cooling Fan with 2 Fan Speeds, Digital Display, Remote Control, 24 Hour Timer & Dual Window Venting Kit

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Why We Love It

Advanced cooling efficiency.
User-friendly controls.
Eco-friendly operation.

Main Highlights

ADVANCED COOLING POWER – Provides a powerful 9,000 BTU of cooling capacity for fast and effective cooling down to as low as 16°C. Designed to rapidly & efficiently remove warm air and replace it with cool air. Perfect for medium to large-sized rooms on hot summer days.
DIGITAL DISPLAY & REMOTE CONTROL – Easy to use touch control panel & remote control allows you to switch between the different modes, speeds and 24Hr timer for effortless cooling.
4-IN-1 FEATURES – Comes with 4 built-in multi-purpose operating modes including air cooling, dehumidifying, fan only and sleep mode. The timer can be set up to 24hrs for cooling during the day and night. The louvres can also be adjusted both horizontally and vertically to direct airflow across a wide area or in a chosen direction.
ENERGY EFFICIENT – Boasting a Class A energy efficient rating provides a cost effective way to staying cool in the summer. The air conditioner utilises an R290 refrigerant gas which is 690 times more eco-friendly than standard air conditioning gases.
WINDOW KITS INCLUDED – Includes window kits for both sliding and hinged windows to allow for the installation of the air conditioner. To install the required window kit, just follow our step-by-step instructions in the manual.

8.9

Excellent

We scanned 1704 products

We reviewed these offers relevant to the Quiet Portable Air Conditioning Unit 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 Bosch Thermotechnik, Dreo, Pro Breeze, De'Longhi, EUHOMY, Maxesla, JYMIPA, LEENON, DR.PREPARE, Emperial, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Quiet Portable Air Conditioning Unit in the market, we considered we took a deep dive into 8521 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 Bosch Cool 5000 with Inverter Technology Portable AC - 3-in-1: Air Conditioner, Dehumidifier, Fan - 3.4 kW for Rooms of up to 46 m² - With Auto Mode, Silent Mode & Sleep Mode. We love many things about this product by Bosch Thermotechnik. What sets it apart from the competition is Energy-efficient and powerful cooling, Whisper-quiet operation at 44 dB, Easy control with pre-programmed modes.
The best value product for most shoppers and where user satisfaction is continuously the highest is Dreo Smart 3-in-1 Portable Air Conditioner, 12000 BTU Drainage-Free Cooling AC Unit, 46dB Silent Mobile Air Conditioners for Bedroom & Room, APP/Voice/Remote Control, 24h Timer with Fan & Dehumidifier by Dreo based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Quiet Portable Air Conditioning Unit and the best cost-to-value ratio is Air Conditioning Unit, 9000 BTU Portable Air Conditioner with 3-in-1 Cooling & Fan & Dehumidifier Functio, Air Conditioners with Digital Display & Remote Control, 24H Timer for Room Up to 300 ftat JYMIPA with a 15% discount.
Our list of the best Quiet Portable Air Conditioning Unit 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 Quiet Portable Air Conditioning Unit in The UK

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We scanned 1704 products

We concluded that: