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Heat Pump Installers in Cardiff

Thermal Earth has been installing heat pumps across Cardiff and South Wales for over 20 years. From Victorian terraces in Pontcanna to new-build developments in Cardiff Bay, we design and install ground source and air source heat pump systems for homes and businesses of all sizes.

Cardiff homeowners are increasingly switching from gas boilers to heat pumps, driven by rising energy costs and the £7,500 Boiler Upgrade Scheme grant. With its mix of well-insulated modern homes and older properties ripe for retrofit, Cardiff is one of the most active areas in Wales for heat pump installations.

Our Work in Cardiff

We have completed multiple projects across the Cardiff area, including:

  • Cardiff Living Social Housing — a major ground source heat pump installation serving a social housing development, demonstrating how shared ground loop systems deliver efficient, low-cost heating at scale
  • Addison House Community Living — a community living scheme in Cardiff fitted with MasterTherm heat pumps for reliable, year-round heating and hot water
  • Eastern High School — visited by the Chair of Ofgem, this installation showcases how heat pumps serve large commercial buildings efficiently
  • St Nicholas School — another successful school installation in the Cardiff area using ground source technology

Why Heat Pumps Work Well in Cardiff

Cardiff’s mild maritime climate is ideal for heat pumps. Winter temperatures rarely drop below freezing for extended periods, meaning both air source and ground source heat pumps operate at high efficiency throughout the heating season. Ground source systems achieve COP ratings of 4.0 to 5.0 in Cardiff’s soil conditions, delivering 4 to 5 units of heat for every unit of electricity used.

For properties without garden space for ground collectors, air source heat pumps are an excellent alternative. Modern units like the MasterTherm BoxAir Inverter operate quietly and efficiently, making them suitable for terraced and semi-detached homes in Cardiff’s residential streets.

Cardiff Heat Pump Costs and Grants

A typical heat pump installation in Cardiff costs between £8,000 and £18,000 for air source, or £18,000 to £45,000 for ground source (with borehole drilling). The £7,500 Boiler Upgrade Scheme grant is available to all Cardiff homeowners and is deducted directly from your installation cost.

As an MCS certified installer, Thermal Earth handles the full BUS grant application on your behalf. We also offer flexible finance options to spread the remaining cost.

Get a Free Quote in Cardiff

Ready to explore heat pumps for your Cardiff property? Contact Thermal Earth for a free, no-obligation consultation. We’ll assess your property, recommend the right system, and provide a full cost breakdown including the BUS grant.

Why Choose Thermal Earth in Cardiff?

Thermal Earth has been operating in the Cardiff area since 2006. We bring a level of expertise that few local installers can match:

  • 20+ years of experience with over 3,500 heat pump installations across Wales and the UK
  • MCS certified installer — required for the £7,500 BUS grant. We handle the full application
  • Own borehole drilling team — three specialist rigs, giving us full control over quality and scheduling
  • MasterTherm partnership — we install MasterTherm heat pumps, manufactured in the Czech Republic with some of the highest efficiency ratings on the market
  • Comfort Care service plan — ongoing maintenance and support after installation
  • Online monitoring — remote system monitoring so we can identify and resolve issues before you notice them

Areas We Cover Near Cardiff

We install heat pumps across the greater Cardiff area and South Wales, including Pontcanna, Canton, Whitchurch, Llandaff, Roath, Cathays, Penylan, Cyncoed, Radyr, St Fagans, Penarth, Barry, Caerphilly, and the Vale of Glamorgan. Whether you are in the city centre or a surrounding village, our team covers the full Cardiff region.

Frequently Asked Questions

How much does a heat pump cost in Cardiff?

A typical air source heat pump installation in Cardiff costs between £8,000 and £18,000, while ground source systems range from £18,000 to £45,000 depending on your property size and ground conditions. The £7,500 BUS grant is deducted directly from the price. For a personalised estimate, use our free online calculator or request a consultation.

Do I need planning permission for a heat pump in Cardiff?

Most air source heat pump installations fall under permitted development and do not require planning permission in Cardiff. Ground source systems rarely need permission either, as the ground works are underground. However, listed buildings and properties in conservation areas may need consent. We check planning requirements for every project as part of our site assessment.

Can I keep my existing radiators with a heat pump?

Yes, many heat pumps work well with existing radiators. Because heat pumps operate at lower flow temperatures than gas boilers, radiator suitability must be assessed. Larger or modern radiators tend to perform best. In some cases, upgrading a few key radiators improves efficiency and comfort. Our engineers carry out a full heat loss survey to determine exactly what is needed — many Cardiff homes need no radiator changes at all.

What grants are available for Cardiff homeowners?

Cardiff homeowners can claim the £7,500 Boiler Upgrade Scheme grant towards any heat pump installation — no income test required. The Welsh Government’s Nest Scheme and Green Homes Wales programme offer additional support for eligible households. These can sometimes be combined with the BUS grant. We advise on all available funding during your free consultation.

How long does a heat pump installation take?

A typical air source heat pump installation takes 2–3 days. Ground source systems take longer — typically 3–5 days for the indoor works plus 1–3 days for borehole drilling or trench excavation. We restore any garden areas after ground works are complete. Our own drilling team means we can schedule efficiently without relying on third-party contractors.

Do air source heat pumps work in Cardiff’s climate?

Yes, exceptionally well. Cardiff’s mild maritime climate is ideal for air source heat pumps. Modern systems are designed for much harsher winters than Cardiff experiences — countries like Norway and Sweden use heat pumps widely. Even when temperatures drop below freezing, today’s heat pumps include advanced defrost cycles and smart controls to maintain performance.