How much does an air-to-air heat pump cost?
It depends mainly on the number of rooms, the size and type of indoor units and the pipe runs. A single room is the most affordable start. You get an indicative cost after a short remote assessment, then a firm written price.
The key points
- Each room needs its own indoor unit
- One outdoor unit can often serve several rooms
- Pipe runs, access and electrics affect the price
- A proper quote includes making good and drainage up front
- A grant only applies when replacing fossil-fuel heating for the whole home
The short answer
It depends mainly on how many rooms you want to treat, the size and type of the indoor units, and how far the pipework has to run. A single-room system is the most affordable starting point; each extra room adds an indoor unit and installation time. We don’t publish a headline price, because without seeing the rooms any figure would be a guess. Instead we give you an indicative cost after a short remote assessment, then a firm price once the sizes and positions are confirmed.
What makes up the price
- Number of rooms. Each room needs its own indoor unit. One outdoor unit can often serve several rooms (a multi-split system).
- Capacity. Bigger or sunnier rooms need larger units.
- Indoor unit style. Wall-mounted units are the most common and usually the most economical; floor-standing and ceiling types cost more.
- Pipe runs. The distance and route between indoor and outdoor units: through one wall, or across a loft and down the outside.
- Outdoor unit position. A ground-level base is simpler than a high bracket that needs access equipment.
- Electrics. Most systems need a dedicated circuit from your consumer unit, and an older consumer unit may need work.
- Condensate drainage. Water collected while cooling has to be piped away sensibly.
- Controls. Remote and app control are common; integration with other systems adds cost.
Costs people forget
Making good around wall penetrations, trunking to hide pipework neatly inside, and any building work for access. A proper quote includes these from the start, so nothing is “discovered” on the day.
Is there a grant?
Only in one situation: the Boiler Upgrade Scheme offers £2,500 for an air-to-air system that replaces fossil-fuel heating and is designed to heat the whole home, fitted by an MCS-certified installer. Systems that add cooling or heating to a few rooms alongside your existing boiler don’t qualify. See the Boiler Upgrade Scheme explained.
Running costs matter as much as the price
A slightly larger, more efficient unit can cost less over its life than the cheapest option. See how much an air-to-air heat pump costs to run.
How to get a reliable figure
Send us a few photos or a short video of the rooms and the outside wall through the home assessment. You’ll get an indicative cost, and once the unit sizes and positions are technically confirmed, a firm, written price.
Sources
Questions
Why don't you publish a price?
Because without seeing the rooms any figure would be a guess. We'd rather give you a real one quickly.
Is one room much cheaper than three?
Yes. Each extra room adds an indoor unit and installation time, though a shared outdoor unit helps.
Do I need electrical work?
Usually a dedicated circuit. An older consumer unit may need upgrading.
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