Air-to-air heat pumps
By Airva Editorial · Reviewed by Airva Technical Review · Updated 13 July 2026
Most modern reversible air-conditioning systems are air-to-air heat pumps. They move heat rather than burning fuel: out of the building when cooling, and into it when heating.
Heating and cooling in one system
- Summer — the system cools rooms like conventional air conditioning.
- Winter — the same units can warm rooms efficiently, often delivering several units of heat per unit of electricity.
This makes them a flexible, year-round option — see running costs for what that means in practice.
Grant support
There is a government grant category for eligible residential air-to-air heat pumps. Eligibility is never automatic — it depends on the property, the system, your existing heating and the installer's qualifications. We help eligible homeowners check their options and route grant-relevant enquiries to appropriately qualified installers. Grant details change, so treat any figure as indicative until confirmed.
Explore split systems and multi-split systems, or request an installer match.
Explore more
- Air Conditioning External Unit
- Air Conditioning for Flats
- Air Conditioning Installation Process
- Air Conditioning Noise
- Air Conditioning Planning Permission
- Air Conditioning Running Costs
- Air Conditioning Without an Outdoor Unit
- Bedroom Air Conditioning
- Home Air Conditioning Cost
- Loft Conversion Air Conditioning
- Multi-Split Air Conditioning Systems for the Home
- Split Air Conditioning Systems for the Home