Portable Air Conditioner
A practical portable air conditioner (7000 BTU, 4-in-1) for proper, portable cooling around the home.
The Best Portable Air Conditioners in the UK (2026)
A portable air conditioner gives you proper, moveable cooling in a heatwave - real refrigerated cooling like a fridge, not just moving warm air around like a fan. The choice comes down to cooling power (BTU) matched to your room, the noise level, whether it also dehumidifies, and the running cost. This guide explains what matters, then lists our top picks.
Quick answer
Match the BTU to your room: roughly 5,000-7,000 BTU for a small bedroom, 8,000-10,000 for an average living room, and 12,000+ for large or sunny rooms. Most units are 3-in-1 (cool, fan, dehumidify), and all need a window for the exhaust hose. The UK market is mostly value brands, with De'Longhi at the premium end.
What to look for
- BTU (cooling power) - the single most important figure; match it to room size.
- Noise level (dB) - matters most in bedrooms; look for a night mode.
- Dehumidifier function - 3-in-1 / 4-in-1 units earn their keep year-round.
- Energy class - affects running cost.
- Window-sealing kit - usually included for the exhaust hose.
- Castors and weight - for moving it between rooms.
How we pick
We rank on real-world usefulness: cooling power for the room size, noise, modes, energy use and ease of setup. We don't show scraped prices or star ratings; our editorial score reflects how well each cools a typical UK room. Prices spike during summer heatwaves, so check the live Amazon price before buying.
Our top picks
#1
#2 
Dreo Smart 3-in-1 Portable Air Conditioner
A practical portable air conditioner (10000 BTU, 3-in-1) for proper, portable cooling around the home.
#3 
Portable Air Conditioner
A practical portable air conditioner (14000 BTU) for proper, portable cooling around the home.
#4 
Portable Air Conditioner
A practical portable air conditioner (12000 BTU) for proper, portable cooling around the home.
#5 
MOBIS PLUS 10 UK
A practical portable air conditioner (10000 BTU) for proper, portable cooling around the home.
#6 
ZAFRO Inverter Portable Air Conditioner
A practical portable air conditioner (14000 BTU, 42 dB) for proper, portable cooling around the home.
#7 
Portable Air Conditioner
A practical portable air conditioner (12000 BTU) for proper, portable cooling around the home.
#8 
Portable Air Conditioning Unit
A practical portable air conditioner (9000 BTU, 4-in-1) for proper, portable cooling around the home.
#9 
Portable Air Conditioner
A practical portable air conditioner (14000 BTU, 3-in-1) for proper, portable cooling around the home.
#10 
Portable Air Conditioner
A practical portable air conditioner (16000 BTU, 5-in-1) for proper, portable cooling around the home.
Frequently asked questions
Do portable air conditioners actually work?
Yes - unlike a fan or air cooler, they use a refrigerant compressor to genuinely lower the room temperature. The catch is they vent hot air through a hose to a window, so you need a window nearby, but they do properly cool a room.
How many BTU do I need?
Roughly 5,000-7,000 BTU for a small bedroom, 8,000-10,000 for an average living room, and 12,000+ for large or open-plan spaces. Too few won't cool the room; too many wastes energy and money.
Do they need a window?
Yes - all portable air conditioners need to vent hot air outside through an exhaust hose, which fits to a window with the supplied sealing kit. This is the key difference from an air cooler, which needs no window but doesn't truly cool.
Bottom line
Our top pick is the Portable Air Conditioner (our score 9.6/10) - A practical portable air conditioner (7000 BTU, 4-in-1) for proper, portable cooling around the home..