Is air conditioning expensive to run?

How much does it cost to run air conditioning in the UK? I'm seriously considering it, but a bit worried about the electricity costs. Can anyone give me an idea of what to expect if it was used over the warmer months?

Asked by Joyce on 17th Sep 2025
Expert Trade Answers
"Hi to answer this as honest as I can,we must understand that it all Varys, typically nothing is cheap in the uk anymore especially energy,but no they are not as expensive as you’d think as thy don’t run all the time,the system should be spec’d specifically for the room/rooms and work on a thermostat basis,they are cheaper to run if you have fixed air conditioning and not portable"
Answered on 17th Sep 2025 - Member since Jun 2025 - report
"How much does air conditioning cost to run in the UK?

Bedroom size unit → about 50p–£1 per day

Lounge size unit → about 75p–£2 per day

Portable unit → about £1–£3 per day (less efficient)

Over the whole summer (June–August), most households spend £50–£150 depending on room size, hours of use, and tariff."
Answered on 17th Sep 2025 - Member since Mar 2021 - report
"It depends on usage and how hard it has to work generally about per hour but that's initial start up once the room reaches ambient temperature it uses far less energy costing very low providing the installation engineer sizes it according to your room size and insulation"
Answered on 17th Sep 2025 - Member since Jun 2023 - report
"Modern Air condition from a reputable company like Daikin is very cheap to run than your conventional has boilers.
It is now called Air to Air source heat pump- use for cooling and heating.
It is over 3 times more efficient than your gas boiler.
You can use it with battery storage system and solar and you will pay next to nothing and use free energy year in year out 24 -7."
Answered on 9th Oct 2025 - Member since Dec 2024 - report
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