Best Portable Air Conditioners UK 2026 — 9,000–12,000 BTU, Ranked
A portable AC is the only non-installed way to beat a UK heatwave. These are the 5,000–12,000 BTU units we carry, ranked by published cooling output and true running cost.
Portable air conditioners draw honest power, so the running-cost number matters as much as the BTU. Every unit below lists its true amperage-class cooling in kW and its pence-per-hour running cost at a typical tariff.
Dimplex 3.5kW Portable AC
£599Dimplex brings eighty years of climate control to portable AC: 3.5 kW of cooling, a dehumidify mode and build quality that outlasts budget units.
View Dimplex 3.5kW Portable ACelectriQ 12000 BTU
£299.98Twelve thousand BTUs with an A energy rating and four modes — the electriQ big-room option that doesn’t punish the meter.
View electriQ 12000 BTUOlimpia Splendid Dolceclima 12 WiFi
£469The Dolceclima 12 is Olimpia Splendid’s flagship portable: 12,000 BTU, whisper-tuned airflow and an app that’s genuinely pleasant to use. Premium cooling for open-plan living.
View Olimpia Splendid Dolceclima 12 WiFiComfee 12000 BTU Wi-Fi AC
£379Twelve thousand BTUs with MSmartHome app control and Alexa support — Comfee's big-room unit that you can fire up from the commute.
View Comfee 12000 BTU Wi-Fi ACBlack+Decker 12000
£349The 12,000 BTU Black+Decker handles open-plan living rooms and loft conversions with 3.5kW of refrigeration on tap.
View Black+Decker 12000Costway 12000 WiFi
£300.99A Wi-Fi smart 12K unit with a heat mode for chilly spring evenings. Cool, heat, dehumidify or fan — all from your phone.
View Costway 12000 WiFiMeaco MeacoCool MC 10000
£449.99Meaco's mid-size MeacoCool brings 10,000 BTU, a low 52 dB noise floor and a proper sleep mode — the quiet one for light sleepers.
View Meaco MeacoCool MC 10000AEG ChillFlex Pro
£450German engineering with a heat pump for winter: AEG’s 9,000 BTU ChillFlex Pro is A-rated and built to outlast a decade of heatwaves.
View AEG ChillFlex ProBoth a portable AC and an evaporative cooler have a place in a UK home. For below-30°C evenings, an air cooler costs pennies; for a genuine heatwave, the AC wins. We stock both — all units show real specifications on the product page.
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