For most UK homes, air conditioning costs £2,000–£8,000 to install and £80–£260 a year to run per indoor unit at typical usage. Premium brands like Daikin and Mitsubishi cost 15–25% more up-front but deliver lower running costs and longer warranties.
Up-front cost by property size
A 1-bed flat with a single split sits around £2,000–£2,800. A 3-bed semi with 3 indoor heads usually lands at £5,500–£7,000. A larger detached home with 4–5 heads is £7,000–£8,500.
Running costs
A modern A++ split running 6 hours a day in summer costs around £0.45–£0.80 a day in electricity at current Ofgem unit rates. Across a UK summer that's £40–£100 per indoor unit.
Brand premium; is it worth it?
Daikin, Mitsubishi Electric and Panasonic command a 15–25% premium over budget brands. In return you get higher SEER ratings (8–9 vs 6–7), longer parts warranties (5–7 years vs 2–3) and quieter operation.
How to lower the total cost
Choose inverter-driven models (variable speed, much lower running cost), size the units correctly (oversized AC short-cycles and wastes energy), and route pipework efficiently to keep the outdoor unit close to the indoor heads.
See what installers in your area would actually charge.
Get matched quotesFrequently asked questions
Is air conditioning expensive to run in the UK?+
No; modern inverter splits typically cost £40–£100 per unit per summer at current electricity prices. They are far cheaper to run than portable AC units.
Which is the cheapest air conditioning brand?+
Budget brands like Midea, Hisense and Gree cost 15–25% less than Daikin or Mitsubishi but typically have lower SEER ratings and shorter warranties.
Can air conditioning heat my home in winter?+
Yes; any modern AC system is technically an air-source heat pump and provides heating down to about -10°C ambient. Many UK homes use AC for shoulder-season heating to offset gas bills.