Heat Pumps in Cardiff
Independently writtenCardiff's mild South Wales climate makes it an excellent location for air source heat pumps. Welsh Government energy schemes combined with the BUS grant give Cardiff homeowners strong financial support for the switch.
Cardiff at a glance
5.1°C
Average winter temperature
Source: Met Office
2180
Heating degree days
Source: Regional data
£835/yr
Est. heat pump running cost
Source: Ofgem rates Q1 2026
£-30/yr
Est. saving vs gas
Source: Calculated
Housing in Cardiff
Victorian and Edwardian terraces, 1930s semis, and newer estates. Cardiff has a mix of well-insulated modern homes and older properties that may need upgrades.
Heat pump costs in Cardiff
An air source heat pump in Cardiff typically costs £8,000–£15,000 before the £7,500 BUS grant. After the grant, most Cardiff homeowners pay £500–£7,500.
Running costs depend on your property size and insulation. For a typical 3-bed semi in Cardiff, expect to pay around £835 per year to run a heat pump — compared to £805 for gas heating. That's a saving of approximately £-30 per year.
Cardiff's mild climate means lower heating demand and higher heat pump efficiency — you'll get more heat per unit of electricity here than in colder regions.
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