Costs
6 min readIs air conditioning worth it in a British house?
For cooling alone, it is a comfort purchase rather than an investment. For a room your heating never reaches, the arithmetic is different. Which one you are is the whole question.
The short answer
If you will only ever run it in a heatwave, the honest answer is that it does not pay for itself — you would be buying comfort on the handful of nights a year when a bedroom is unusable, which is a perfectly good reason to spend £1,895 but not a financial one, and anybody telling you otherwise is selling something. If you will use it as a heater for a room your central heating serves badly — a loft conversion, a room over a garage, a home office at nine in the morning — the arithmetic is genuinely different, because it runs at three to four times the efficiency of a plug-in electric heater and about a quarter of the cost per unit of heat. Which of those two people you are is nearly the whole decision, and it is worth being honest with yourself about it before you get a price rather than after.
The three things people leave out
Most people weighing this up are comparing a large one-off cost against a few uncomfortable nights, and reaching the obvious conclusion. Three things usually missing from that comparison change it.
- It is a heater. The same unit that cools in July heats in October, efficiently, and that is where nearly all of the running-cost argument lives. The full arithmetic is in what it costs to run — the short version is that counting only the cooling days makes the purchase look far worse than it is.
- The rules changed, twice. Most of what you will read about needing planning permission is out of date. The one-metre boundary rule went in May 2025 and a noise test replaced it — what changed and when.
- There may be £2,500 off. Air-to-air heat pumps became eligible under the Boiler Upgrade Scheme in April 2026 — though the condition that the property has no fossil fuel heating disqualifies most homes with a gas boiler. Who actually qualifies.
When the answer is probably yes
- A room the heating never fixes
- Strong caseLoft conversion, room over a garage, north-facing study. You are likely already running an electric heater there at four times the cost per unit of heat
- You sleep badly in summer
- Strong caseThe comfort argument stops being soft when it is costing you sleep for six weeks a year
- You work from home
- Strong caseOne room, warm at nine and cool at two, without heating or cooling the rest of the house
- No gas at the property
- Strong caseIf the alternative is direct electric, the running-cost gap is roughly four to one
- A west-facing room that bakes
- Good caseGlazing and afternoon sun make some rooms genuinely unusable in a way shading does not fix
When it probably isn't
We would rather say this now than after a survey. These are the cases where we would tell you to keep your money, and some of them are cases where somebody else would happily take it.
- You want the whole house done. Fitting heads in every room to replace a radiator circuit is neither cheap nor sensible. If you want a heat pump that replaces the boiler, that is a different machine — air-to-air against air-to-water.
- You want hot water from it. It does nothing for your taps. Nothing at all.
- You are hot for four days a year and fine otherwise. A fan and a blackout blind cost £60 and solve a four-day problem. We would rather you bought those.
- You are moving soon. Treat it as a comfort purchase for the time you are there, not as something that returns its cost on sale. We are not going to claim it adds value to your house, because we have no evidence that it does.
What it costs to find out
£1,895 for one room fitted, £2,395 with the pipework concealed, £3,795 for two rooms. Published prices rather than estimates, with what sits inside them and what legitimately changes them set out in full. You have fourteen days to change your mind from the day you order, and nothing is drilled until you have signed off where the unit goes.
If you are still weighing it up, the most useful next thing is usually a number for your actual room rather than more reading — a few questions about the room gets you an indicative band in about a minute, with no email address and no callback. If air conditioning is the wrong answer for your room, that is where we say so.
Where this comes from
We’d rather you checked. These are the primary sources behind the claims above, in the order they matter.
- Duneair published price listThe installed prices quoted here. Checked against the live list on the date above.
- Ofgem — Boiler Upgrade SchemeThe £2,500 air-to-air figure and the fossil-fuel exclusion that disqualifies most households.
Not yet independently reviewed. This guide was written from the primary sources listed above and is accurate to the best of our understanding on the date shown. It hasn’t been checked by an independent compliance professional, and it isn’t legal advice. Where a decision turns on it, verify with your local authority or with Ofgem directly — and tell us if we’ve got something wrong.