What is a Heat Pump?
A device that moves heat from outside air or ground into your home, using electricity
A heat pump is a heating system that extracts thermal energy from outdoor air (air source) or the ground (ground source) and transfers it inside your home at a much higher temperature. Because it moves heat rather than generating it, heat pumps deliver 3-4 units of heat per unit of electricity consumed.
Where it wins
- Delivers 3-4x more heat energy than electricity consumed
- Eligible for government grant (currently up to £7,500, subject to eligibility)
- Significantly lowers carbon emissions
- Works in temperatures as low as -20°C
Where it struggles
- Higher upfront cost than a gas boiler
- Requires outdoor space for the unit
- Best performance with underfloor heating or large radiators
- May need an electricity supply upgrade
How it works
01
Refrigerant absorbs heat from outside air at low temperature
02
A compressor increases the refrigerant pressure raising its temperature
03
Hot refrigerant passes through a heat exchanger warming your home's water circuit
04
Cooled refrigerant expands and the cycle repeats
Heat Pump: common questions
What is a Heat Pump?
How does a Heat Pump work?
See what heat pumps cost in your town
Prices for 160 towns, with the grant position for your nation.