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1. Review complete
Read our reviewWessex 9,000 BTU
Our established benchmark, tested in a UK bedroom through hot summer weather.
Updated for summer 2026
The best portable air conditioners for UK homes.
We compared cooling power, noise and real running costs to find the units worth making room for before the next heatwave.
Good to know: We may earn a commission if you buy through our links. It never affects what we recommend.
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The shortlist
Four units. One fair test.
The products are chosen, but the order is not. We’ll set the final ranking only after all four have been tested under the same real-world conditions.
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2. In testing
Review coming soonBush 9K Air Conditioner
The Argos option in our like-for-like 9,000 BTU comparison.
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3. In testing
Review coming soonGoodHome Culver 9,000 BTU
B&Q’s 9,000 BTU model, being assessed for cooling, noise and everyday usability.
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4. In testing
Review coming soonPrincess 9K Air Conditioning Unit
A second widely available Argos model, tested using the same criteria.
What size air conditioner do you need?
Cooling capacity is usually measured in BTU. A higher number can cool a larger space, but bigger is not automatically better: oversized units cost more to run and take up more room.
For a typical UK bedroom or home office, a 7,000–9,000 BTU unit is often the useful starting range. Large, sunny rooms may need 10,000–12,000 BTU or more.
Portable doesn't mean hose-free
A genuine air conditioner moves heat outside through an exhaust hose. “Air coolers” without a hose are evaporative coolers; they are cheaper but produce a much smaller temperature change.