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Heating your home

Air source heat pumps


  • Could lower your fuel bills
  • Will cut your carbon emissions
  • Can heat your home and hot water

What is an air source heat pump?

An air source heat pump, sometimes referred to as an air-to-water source heat pump, transfers heat from the outside air to water. This in turn heats your rooms via radiators or underfloor heating. It can also heat water stored in a hot water cylinder for your hot taps, showers and baths.

Heat from the air is absorbed into a fluid. This fluid then passes through a heat exchanger into the heat pump, which raises the temperature and then transfers that heat to water.

For more information on how a heat pump works, including details on typical savings, system design and control, see our in depth guide to heat pumps.

Is an air source heat pump right for me? 

Air source heat pumps are suitable for many types of homes. They’re the most common type of domestic heat pump, with tens of thousands of installations across the UK. However, there are a few things you should consider before deciding whether a heat pump is right for you.

How much does an air source heat pump cost?

The cost of an air source heat pump varies depending on:

  • the size of heat pump.
  • the size of the property.
  • whether it’s a newbuild or an existing property.
  • whether you need to change the way you distribute heat around your property.

Typical costs are around £14,000. We recommend speaking to at least three installers to provide a quote for your heat pump system to give you the best idea of likely costs for your home.

If you live in England and Wales you can get £7,500 towards an air source heat pump with the Boiler Upgrade Scheme.

Will a heat pump save me money on my energy bill?

Running costs depend on how your heat pump is designed and how it’s operated. Savings on your energy bill also depend on the system you’re replacing.

You can see potential annual savings of installing a standard air source heat pump, including any recommended radiator upgrades, in an average sized, three-bedroom semi-detached home, below.

For more information, head to our in-depth guide to find out how to get the most out of your heat pump and maximise your savings.

England, Scotland and Wales

Northern Ireland

Last updated: 4 January 2024