A Guide to Air Source Heat Pumps (ASHP)

An air source heat pump absorbs heat from the outside air (even when the weather is cold) to heat your home and water.

They use electricity to run, but the heat output can be around four times the electricity input.

Main benefits

  • Significantly reduces the carbon emissions from heating your home, to near-zero if run on electricity from a renewable source.
  • Almost any home is or can be made suitable for an air source heat pump.
  • Should last around 20 years, with less maintenance than an average gas boiler.

Things to consider

  • Underfloor heating or large radiators, and a hot water tank, are needed.
  • To get the most out of a heat pump, it’s best combined with a well-insulated home.
  • The noise of an air source heat pump is often compared to that of a tumble dryer.

What options are available?

  • Getting the right size of heat pump is critical, and a heat survey is needed to determine this.
  • Having larger radiators running at a lower temperature means you can have a more efficient heat pump.

A modern Air Source Heat Pump outside a house

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