Air conditioner buying checklist
A practical pre-purchase checklist for UK buyers, covering BTU sizing, single vs dual hose, noise, energy rating, drainage, window fit and useful extra modes.
Updated 28 August 2026
UK air conditioning guides
Start with the job you need to complete: size a room, estimate electricity or installation costs, fit a portable-unit exhaust, compare technologies or diagnose a problem. Each guide states its assumptions and links to the relevant calculator.
How much does an air conditioner cost to run in the UK?
Calculate UK air conditioning costs per hour, day and summer using input watts, usage time and the current Ofgem electricity unit rate.
Updated 28 August 2026
Air conditioning installation cost UK (2026 guide)
Typical 2026 UK costs for installing single-split and multi-split air conditioning, what changes the quote and what a proper installation should include.
Updated 28 August 2026
Air cooler vs air conditioner: which works in the UK?
Compare evaporative air coolers, fans and portable air conditioners for cooling power, humidity, electricity use, noise and UK room conditions.
Updated 28 August 2026
Portable air conditioner troubleshooting and maintenance
Diagnose a portable air conditioner that is not cooling, leaking water or showing hose and drainage problems, with safe checks before arranging service.
Updated 28 August 2026
Portable air conditioner window kits and venting guide
Choose and fit a portable air conditioner window kit for UK casement, sash, sliding and tilt-and-turn windows, with practical sealing and hose advice.
Updated 28 August 2026
Portable air conditioners without a hose: what actually works?
Find out whether ventless portable air conditioners really cool a room, how to identify evaporative coolers and what to use when a window hose is impossible.
Updated 28 August 2026
Portable vs split air conditioning — which should I choose?
Compare portable and fixed split air conditioners on installation, cost, noise, efficiency and UK permissions so you can choose the right system.
Updated 28 August 2026
Choosing a quiet portable air conditioner for a bedroom
How to compare bedroom portable air conditioners by sound level, BTU, sleep mode, compressor cycling, window sealing and real overnight running cost.
Updated 28 August 2026
Single-hose vs dual-hose portable air conditioners
Understand how single- and dual-hose portable air conditioners affect room pressure, efficiency, installation and cooling performance in UK homes.
Updated 28 August 2026
What size air conditioner do I need? UK BTU room-size guide
Match 5,000 to 14,000 BTU air conditioners to UK room sizes, then adjust for ceiling height, sunlight, glazing, occupants and heat-producing appliances.
Updated 28 August 2026
Wall-mounted air conditioners without an outdoor unit
How through-wall monoblock air conditioners work, including UK wall openings, noise, condensate, installation and split-system alternatives.
Updated 28 August 2026