BBy Bikram Nath·Researched from UK Amazon listings·Updated 2026-10-16·5 products compared
Disclosure: As an Amazon Associate I earn from qualifying purchases. This guide contains Amazon affiliate links, and we may earn a commission — at no extra cost to you — but it never changes our rankings.
What are the best portable air conditioners to buy in the UK?
Our top pick for Portable Air Conditioners in the UK is the BLU-09 9,000 BTU 3-in-1 Portable Air Conditioner.
The BLU-09 9,000 BTU 3-in-1 Portable Air Conditioner suits rooms up to 20 square metres with UK casement windows: the listing states a window sheet for outward or inward opening windows, a 1.5m expandable exhaust hose, R290 refrigerant and a 1 year limited warranty.
The BLU-09 9,000 BTU portable air conditioner is our top pick because its listing says it is suitable for rooms up to 20 square metres and states a 1.5m expandable exhaust hose, a window sheet for UK outward or inward opening casement windows, R290 refrigerant and a 1 year limited warranty. For app and voice control, the Pro Breeze 12000 BTU lists a Class A Energy Efficiency rating, a 24-hour timer and Alexa and Google Home voice commands; for slide, hung or hinged windows, the Belaco 9000 BTU air conditioning unit with window seal lists a dual window kit and a window seal and says it is ideal for space up to 215 square feet.
This guide compares five portable air conditioners from BLU, Pro Breeze and Belaco, using what each listing states: cooling capacity in BTU, modes, window kit, refrigerant, energy class, room size and warranty. Stated capacities run from 7000 BTU on the Pro Breeze 4-in-1 to 12000 BTU on the Pro Breeze smart unit.
Buying guide
What should you look for in Portable Air Conditioners?
1Cooling capacity: the listings state 12000 BTU (Pro Breeze 12000 BTU), 9,000 BTU (BLU-09), 9000 BTU (both Belaco units; the one with window seal gives 7000BTU on speed 1 and 9000BTU on speed 2) and 7000 BTU (Pro Breeze 4-in-1). Two give a room size: the BLU-09 says rooms up to 20 square metres and the Belaco with window seal says space up to 215 square feet.
2Window kit: all five listings include one. The BLU-09 lists a window sheet for UK outward or inward opening casement windows and a 1.5m expandable exhaust hose; the Pro Breeze 4-in-1 two window venting kits for slide or hinged windows; the Belaco with window seal a dual window kit for slide and single/double hung windows plus a window seal for hinged windows; the Belaco 4in1 a dual window kit; and the Pro Breeze 12000 BTU a window venting kit.
3Refrigerant and energy class: the BLU-09, both Pro Breeze units and the Belaco with window seal name R290 refrigerant; the Belaco 4in1 listing does not name a refrigerant. Both Pro Breeze units and both Belaco units state Class A energy efficiency; the BLU-09 listing states no energy class.
4Modes and controls: all five list cooling, fan and dehumidifying functions. Both Pro Breeze units list a sleep mode and a 24 hour timer, the Belaco with window seal a night mode and the Belaco 4in1 a 24Hr programmable timer; the Pro Breeze 12000 BTU adds app control and Alexa and Google Home voice commands.
5Warranty and noise: the BLU-09 states a 1 year limited warranty, the Belaco with window seal a 1 year warranty and the Belaco 4in1 1 year against any manufacturing defect; neither Pro Breeze listing states a warranty term. Only the BLU-09 gives noise figures: a sound pressure level of 49-53dBA and a sound power level of 62-64dBA.
Our process
How do we choose our picks?
We don’t lab-test products ourselves. Instead we synthesise current Amazon UK listings and published specs into clear, honest recommendations. We earn a commission if you buy through our links, but that never changes which products we rank.
Current UK availability
We check each pick against live Amazon UK catalogue data rather than last year’s model lists. Stock moves fast, so a listing can sell out after we publish.
Published specs
We compare manufacturer specifications so each pick is right for a real budget and use-case.
UK-specific fit
We factor in UK voltage and plug/fitting standards — details that generic global lists miss.
Air cooling, dehumidifying, fan only and sleep; 3 fan speeds
Night, cooling, dehumidifying and 2 speed fan
Air conditioner, fan and dehumidifier
Auto, air cooling, dehumidifying, fan only and sleep
Window Kit
Window sheet for UK outward or inward opening casement windows; 1.5m expandable exhaust…
Window venting kit included
Dual window kit for slide and single/double hung windows; window seal for hinged windows
Dual window kit
Two window venting kits, for slide or hinged windows
Refrigerant
R290
R290
R290
—
R290
Energy Rating
—
Class A
Class A
Class A
Class A
Warranty
1 year limited
—
1 year
1 year against any manufacturing defect (terms and conditions apply)
—
Timer
—
24-hour digital timer; calendar feature
—
24Hr programmable
24 hour on/off
The rankings
The best Portable Air Conditioners, ranked
1
BLU
Top Pick
BLU-09 9,000 BTU 3-in-1 Portable Air Conditioner
The BLU-09 9,000 BTU 3-in-1 Portable Air Conditioner suits rooms up to 20 square metres with UK casement windows: the listing states a window sheet for outward or inward opening windows, a 1.5m expandable exhaust hose, R290 refrigerant and a 1 year limited warranty.
Cooling Capacity
9,000 BTU
Modes
Cooling, fan and dehumidifier; 3 fan speeds
Window Kit
Window sheet for UK outward or inward opening casement windows; 1.5m expandable exhaust hose
Refrigerant
R290
Warranty
1 year limited
Room Size
Rooms up to 20 square metres
What we like
+The listing says it is suitable for rooms up to 20 square metres
+Window sheet for UK outward or inward opening casement windows and a 1.5m expandable exhaust hose included
+Self evaporating function: the listing says it recycles approximately half of the condensed water and evaporates the rest via the hot air duct
+States its noise figures: sound pressure level 49-53dBA, sound power level 62-64dBA
Worth noting
–Cooling only: the listing says it has no heating function
–The listing says it should not be plugged into a multiway extension lead
–The listing states no energy efficiency class
£439.99Amazon.co.uk price as of 17 Oct, 13:00 (London time). Details
Pro Breeze 12000 BTU Smart WiFi Portable Air Conditioner
The Pro Breeze 12000 BTU Smart WiFi Portable Air Conditioner suits buyers who want app and voice control: the listing states 12000 BTU, a Class A Energy Efficiency rating, R290 refrigerant and a 24-hour timer, but no warranty term.
Cooling Capacity
12000 BTU
Modes
Air cooling, dehumidifying, fan only and sleep; 3 fan speeds
Window Kit
Window venting kit included
Refrigerant
R290
Energy Rating
Class A
Timer
24-hour digital timer; calendar feature
Controls
Remote, navigation panel or Pro Breeze app; Amazon Alexa and Google Home voice commands
What we like
+App control, a 24-hour timer and a calendar feature, plus Alexa and Google Home voice commands, per the listing
+Class A Energy Efficiency rating and R290 refrigerant
+The listing says it cools down to 16°C, with automatic oscillating louvres that adjust by 115 degrees
+Also works as a fan with 3 turbo fan speeds and as a dehumidifier, per the listing
Worth noting
–The listing states no warranty term
–The listing gives no room size figure; it says medium to large homes
Belaco 9000 BTU Portable Air Conditioner with Window Seal
The Belaco 9000 BTU Portable Air Conditioner with Window Seal suits slide, hung or hinged windows: the listing states 7000BTU on speed 1 and 9000BTU on speed 2, space up to 215 square feet, R290 refrigerant, Class A and a 1 year warranty.
Cooling Capacity
9000 BTU: 7000BTU on speed 1, 9000BTU on speed 2
Modes
Night, cooling, dehumidifying and 2 speed fan
Window Kit
Dual window kit for slide and single/double hung windows; window seal for hinged windows
Refrigerant
R290
Energy Rating
Class A
Warranty
1 year
Room Size
Space up to 215 square feet
What we like
+The listing says it is ideal for space up to 215 square feet
+Window kit for slide and single/double hung windows, plus a window seal for hinged windows
+Night mode automatically raises the target temperature by 1℃ by 2 hours and changes the fan to low speed, per the listing
+R290 refrigerant and a Class A energy efficiency rating
Worth noting
–The listing states no noise level
–The listing gives no timer range
£429.99Amazon.co.uk price as of 17 Oct, 13:00 (London time). Details
The Belaco 9000 BTU 4in1 Air Conditioning Unit suits buyers who want a stated approval and a programmable timer: the listing says it is Good Housekeeping Institute Approved and states Energy Class A, a 24Hr timer, a dual window kit and 1 year against any manufacturing defect.
Cooling Capacity
9000 BTU
Modes
Air conditioner, fan and dehumidifier
Window Kit
Dual window kit
Energy Rating
Class A
Warranty
1 year against any manufacturing defect (terms and conditions apply)
Timer
24Hr programmable
Approval
Good Housekeeping Institute Approved, per the listing
What we like
+The listing says it is Good Housekeeping Institute Approved
+Energy Class A, per the listing
+Remote control and a 24Hr programmable timer for temperature, modes and schedules
+Dual window kit included; the listing says no permanent installation is required
Worth noting
–The listing does not name a refrigerant
–The listing gives no room size figure and no decibel figure
£449.99£649.99−31%Amazon.co.uk price as of 17 Oct, 13:00 (London time). Details
Pro Breeze 4-in-1 7000 BTU Portable Air Conditioner
The Pro Breeze 4-in-1 7000 BTU Portable Air Conditioner suits buyers who want two window kits for slide or hinged windows: the listing states 7000 BTU, cooling down to 15°C, Class A and R290 refrigerant, but no warranty term.
Cooling Capacity
7000 BTU
Modes
Auto, air cooling, dehumidifying, fan only and sleep
Window Kit
Two window venting kits, for slide or hinged windows
Refrigerant
R290
Energy Rating
Class A
Timer
24 hour on/off
What we like
+Two window venting kits included, to fit slide or hinged windows
+Class A Energy Efficiency rating and R290 refrigerant, per the listing
+Adjustable thermostat in °C and °F, a 24 hour on/off timer and a wireless remote
+The listing says it cools down to 15°C
Worth noting
–The listing states no warranty term
–The listing gives no room size figure and no noise level
Product prices and availability are accurate as of 17 Oct, 13:00 (London time) and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.
Editor's Note
Only two of these five listings give a room size figure, the BLU-09 in square metres and the Belaco with window seal in square feet, and only the BLU-09 states noise figures. Neither Pro Breeze listing states a warranty term, and the BLU-09 listing states no energy class.
Our Take
As a default, the BLU-09: 9,000 BTU, suitable for rooms up to 20 square metres, a window sheet for UK casement windows, R290 refrigerant and a 1 year limited warranty, all on the listing. For app and voice control, the Pro Breeze 12000 BTU lists Class A and a 24-hour timer but no warranty term; for slide, hung or hinged windows, the Belaco 9000 BTU with window seal lists a dual window kit, a window seal and a 1 year warranty.
Questions & answers
Frequently asked questions
Do portable air conditioners need a window kit or hose?
All five units in this guide come with a window kit, per their listings. The BLU-09 includes a 1.5m expandable exhaust hose and a window sheet for UK outward or inward opening casement windows, and its listing says to place the hose out of the window opening. The Pro Breeze 12000 BTU includes a window venting kit, the Pro Breeze 4-in-1 two window venting kits, and both Belaco units a dual window kit.
What size room can a portable air conditioner cool?
Two listings here give a room size: the BLU-09 (9,000 BTU) says it is suitable for rooms up to 20 square metres, and the Belaco 9000 BTU with window seal says it is ideal for space up to 215 square feet. The Pro Breeze 12000 BTU names medium to large homes and the Pro Breeze 4-in-1 small, medium and large homes, without a figure; the Belaco 4in1 names bedrooms, living rooms and offices.
Which portable air conditioners have a sleep or night mode?
The Pro Breeze 12000 BTU lists a sleep mode in which the fan runs at low speed, and the Pro Breeze 4-in-1 an energy saving sleep mode. The Belaco 9000 BTU with window seal lists a night mode that automatically raises the target temperature by 1℃ by 2 hours and changes the fan to low speed. The BLU-09 and Belaco 4in1 listings do not mention a sleep or night mode; the Belaco 4in1 listing describes low noise operation for night-time use.
Can a portable air conditioner also dehumidify?
All five listings here include a dehumidifying function. The Pro Breeze 12000 BTU says it helps ensure optimal humidity between 40% and 60%, the BLU-09 describes a self evaporating function that recycles approximately half of the condensed water, and the Belaco 4in1 says its built-in dehumidifier removes excess moisture.
How loud is a portable air conditioner?
Only the BLU-09 listing gives figures: a sound pressure level of 49-53dBA and a sound power level of 62-64dBA. The Pro Breeze 12000 BTU says its sleep mode runs the fan at low speed and the Belaco 4in1 describes low noise operation, without a decibel figure; the Belaco with window seal and the Pro Breeze 4-in-1 listings state no noise level.
What warranty do portable air conditioners come with?
On these listings: a 1 year limited warranty on the BLU-09, a 1 year warranty on the Belaco 9000 BTU with window seal, and 1 year against any manufacturing defect on the Belaco 4in1, with terms and conditions applying. Neither the Pro Breeze 12000 BTU nor the Pro Breeze 4-in-1 listing states a warranty term.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. UKPicks earns a small commission from qualifying purchases made via links on this page. This does not affect our editorial recommendations or the price you pay.
