10 Best Silent Air Conditioners in The UK

Last updated on 09/05/2025
Advertising disclosure
Best Choice
1
9.8
Exceptional
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
Bosch Thermotechnik
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
9.8
Exceptional
Amazon Logo
Best Value
2
9.7
Exceptional
Dreo Smart 3-in-1 Portable Air Conditioner, 10000 BTU Drainage-Free Cooling AC Unit, 46dB Silent Mobile Air Conditioners for Bedroom & Room, APP/Voice/Remote Control, 24h Timer with Fan & Dehumidifier
Dreo
Dreo Smart 3-in-1 Portable Air Conditioner, 10000 BTU Drainage-Free Cooling AC Unit, 46dB Silent Mobile Air Conditioners for Bedroom & Room, APP/Voice/Remote Control, 24h Timer with Fan & Dehumidifier
Free Shipping
Why We Love It
  • Powerful 10,000 BTU cooling capacity.
  • Quiet operation for peaceful environments.
  • Smart control via voice assistants.
Main Highlights
  • 𝙂𝙤 𝘽𝙞𝙜 𝙤𝙣 𝘾𝙤𝙤𝙡𝙞𝙣𝙜 𝙋𝙤𝙬𝙚𝙧: The DREO AC515S portable air conditioner brings massive 10,000 BTU ASHRAE cooling capacity that reaches up to 14 ft. Helping you keep the comfortable temp in the sweltering summer
  • 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
  • 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
  • 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
9.7
Exceptional
Amazon Logo
3
9.6
Superb
Save 29%
Pro Breeze 4-in-1 Powerful Portable Air Conditioner 12,000 BTU - Smart Home WiFi Compatible - App & Voice Control - Heater & Dehumidifier mode, 24hr Timer & Window Venting Kit - Class A Energy Rating
Pro Breeze
Pro Breeze 4-in-1 Powerful Portable Air Conditioner 12,000 BTU - Smart Home WiFi Compatible - App & Voice Control - Heater & Dehumidifier mode, 24hr Timer & Window Venting Kit - Class A Energy Rating
29% Off
Why We Love It
  • Powerful cooling capacity.
  • Smart home integration.
  • Year-round climate control.
Main Highlights
  • OUR MOST POWERFUL AIR CONDITIONER: This powerful Pro Breeze portable AC Unit features a market leading 12,000 BTU of cooling capacity providing effective cooling down to 16°C in large and extra-large spaces. This mobile aircon is perfect for your home, office, shop, or gym.
  • SMART HOME TECHNOLOGY WITH WIFI: In addition to the remote control, you can connect your smartphone to the AC unit and control the temperature, timer, and various functions through the free Pro Breeze app or voice command. Compatible with Amazon Alexa app and Google Home for iPhone and Android.
  • AIR COOLING, HEATING AND DEHUMIDIFYING: Features four versatile operating modes, including heating, dehumidifying, fan-only and air cooling mode, making this aircon unit it a valuable appliance all year round.
  • ENERGY EFFICIENT: Class A energy efficiency rating, this air con unit utilises R290 refrigerant, which is not only cost-effective but also 690 times more eco-friendly than traditional air conditioning gasses.
  • WINDOW KITS INCLUDED: This portable Air Conditioner comes with an easy-to-install window kit to fit slide and hinged windows. It's four wheels and space-saving design makes it mobile and unobtrusive, ideal for your living room and bedroom.
  • 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!
9.6
Superb
Save 29%
Amazon Logo
4
9.6
Superb
De'Longhi Pinguino PACEM90 Silent Portable 9,800 BTU Air Conditioner, 3 in 1 Air Conditioning Unit, Rooms up to 90m³, A Energy Efficiency, Window Kit Included, White
De'Longhi
De'Longhi Pinguino PACEM90 Silent Portable 9,800 BTU Air Conditioner, 3 in 1 Air Conditioning Unit, Rooms up to 90m³, A Energy Efficiency, Window Kit Included, White
Why We Love It
  • Optimizes airflow with three speeds.
  • Reduces humidity efficiently.
  • Convenient electronic timer control.
Main Highlights
  • POWERFUL AND EFFECTIVE - Maximise your home comfort with De'Longhi’s powerful 9,800 BTU yet quiet portable air conditioner Perfect for keeping your home cool during hotter days
  • SILENT TECHNOLOGY - Using Silent Technology, this Pinguino unit operates at 47-63 dB(A), meaning your relaxation won't be disturbed
  • 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 3 speed settings, Separate dehumidifying function (46l/ 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 1.6m hose length, for easy installation
9.6
Superb
Amazon Logo
5
9.5
Superb
Air Conditioning Unit Portable Air Conditioner 9000 BTU 4-in-1 Dehumidifier, Cooling Fan with 2 Speeds, Digital Display & Remote Control, Window Kit, 24 Hour Timer for Room Up to 269sq.ft
KGOGO
Air Conditioning Unit Portable Air Conditioner 9000 BTU 4-in-1 Dehumidifier, Cooling Fan with 2 Speeds, Digital Display & Remote Control, Window Kit, 24 Hour Timer for Room Up to 269sq.ft
Free Shipping
Why We Love It
  • Powerful cooling efficiency.
  • Multifunctional climate control.
  • Eco-friendly operation.
Main Highlights
  • ☃️【9000BTU Cooling Up to 269ft】Tired of sweltering summer days? Why not dive into refreshing cool air wherever you go with our compact cooling marvel. 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 269ft instantly. Start your unforgettable cooling journey in bedroom, living room, office or garage from now on.
  • 4️⃣【4-in-1 Multiple Functions】KGOGO 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 60 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 intuitive control panel 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.
  • 🛂【All-round Worry-free Service】We provide customer support to keep you away from after-sales worries. If you are not satisfied with KGOGO air conditioner or have any other questions, please feel free to contact us. Our after-sales service experts will reply to your information within 24 hours to solve your problems. You can purchase and experience with confidence.
9.5
Superb
Amazon Logo
6
9.5
Superb
Save 15%
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㎡)
EUHOMY
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㎡)
15% OffFree Shipping
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.
9.5
Superb
Save 15%
Amazon Logo
7
9.4
Superb
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
DR.PREPARE
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
Free Shipping
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.
9.4
Superb
Amazon Logo
8
9.2
Superb
Save 15%
Pro Breeze 4-in-1 Portable Air Conditioner 7000 BTU with Remote Control, 24 Hour Timer & Dual Window Venting Kit Included. Powerful Air Conditioning Unit with Class A Energy Efficiency Rating
Pro Breeze
Pro Breeze 4-in-1 Portable Air Conditioner 7000 BTU with Remote Control, 24 Hour Timer & Dual Window Venting Kit Included. Powerful Air Conditioning Unit with Class A Energy Efficiency Rating
15% OffFree Shipping
Why We Love It
  • Strong cooling power.
  • Easy digital control.
  • Energy-efficient operation.
Main Highlights
  • POWERFUL AIR CONDITIONER : This 7000 BTU air conditioner provides strong and effective cooling down to 15°C in small, medium and large homes, living rooms, bedrooms and offices.
  • DIGITAL DISPLAY & REMOTE CONTROL: The air conditioners easy-to-use digital LED display and wireless remote control allows you to have full control of all operating modes including auto, cooling and sleep as well the built-in 24 hour on/off timer and adjustable thermostat temperature control (in °C & °F).
  • ENERGY EFFICIENT AIR CONDITIONER: This A/C unit boasts a Class A Energy Efficiency rating to ensure that keeping you cool in the summer heat is cost effective. This air conditioner utilises an R290 refrigerant which is up to 690 times more eco-friendly than traditional air conditioning gasses. The advanced sleep mode keeps you cool whilst reducing overnight energy consumption.
  • WINDOW KITS INCLUDED: This Air Conditioner includes two easy-to-install window venting kits, allowing the AC unit to fit either slide or hinged windows using the step by step instructions provided. Its space-saving design also ensures minimal intrusion.
  • 4-IN-1 FEATURES: This portable air conditioning unit features 4 multi-purpose operating modes including auto, air cooling, dehumidifying, fan only and energy saving sleep modes. Use the automatic oscillation mode to direct air flow across a wide are or in a precise direction.
  • 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!
9.2
Superb
Save 15%
Amazon Logo
9
9.1
Superb
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
LEENON
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
Free Shipping
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.
9.1
Superb
Amazon Logo
10
9.1
Superb
Save 20%
Ariston MOBIS PLUS 10 UK portable air conditioner, 10000 BTU, A+ energy class, white - Manufactured to be installed in UK (3381530)
Ariston
Ariston MOBIS PLUS 10 UK portable air conditioner, 10000 BTU, A+ energy class, white - Manufactured to be installed in UK (3381530)
20% Off
Why We Love It
  • Optimized for UK installation.
  • Covers 13-20m² efficiently.
  • Silent operation at 50 dB.
Main Highlights
  • Air Conditioner designed and manufactured to be installed in UK
  • RECOMMENDED AREA 13-20m²
  • COOLING CAPACITY 10,000 BTU/h
  • HIGH EFFICIENCY: The Mobis range is designed to ensure high efficiency operation, with the Mobis Plus 10 model boasting an EER of 3.1 and therefore achieving A+ energy class
  • EASY TEMPERATURE REGULATION: Easy to use, thanks to its intuitive interface and remote control, Mobis Plus 10 ensures precise temperature regulation to enjoy full comfort in any indoor environment
  • SUPER SILENT: Quiet operation at 50 dB(A), making your environment even more comfortable
9.1
Superb
Save 20%
Amazon Logo