Skip to content Upgrade your home with an energy-efficient air source heat pump and reduce your heating bills. Installed by trusted Welsh engineers
Save on heating bills £7,500 government grant available Low carbon, future-proof heating
In Wales, many homes still rely on oil, LPG or older heating systems. With rising oil prices and energy uncertainty, more homeowners across South Wales are switching to heat pumps for a more stable and efficient solution.
Rural areas across Wales, including Carmarthenshire, Pembrokeshire and Neath Port Talbot, are especially affected by rising oil costs. A heat pump removes the need for fuel deliveries and gives you consistent heating all year round.
Every home in Wales is different. We provide a fixed quote after your free survey.
MOST HOMES QUALIFY FOR A £7,500 GRANT
£7,500 Boiler Upgrade Scheme available in Wales
From £1,500 – £6,500 after grant
Most homes in Wales pay significantly less after the £7,500 grant
Takes 30 seconds No obligation Fix Price
-proof heating
The Boiler Upgrade Scheme (BUS) is a government grant offering £7,500 towards the cost of an air source or ground source heat pump in Wales. It’s available to homeowners upgrading from traditional heating systems, helping you make the switch to renewable heating without the full upfront cost.
At Celtic Green Energie, we specialise in providing quality heat pump installations across Wales, including Carmarthen, Swansea, Cardiff, and Pembrokeshire. Our expert team is dedicated to delivering efficient and sustainable heating solutions tailored to your home’s unique requirements.
As a trusted installer, we can help you secure your BUS grant and install a high-efficiency heat pump that reduces your energy bills, carbon footprint, and reliance on fossil fuels.
To qualify for the BUS grant in Wales, you must:
✔️ Own a property in Wales (domestic or small non-domestic)
✔️ Have an existing gas, oil, LPG, or direct electric heating system
✔️ Plan to install a qualifying heat pump (air source or ground source)
✔️ Hold a valid Energy Performance Certificate (EPC) with no outstanding loft or cavity wall insulation recommendations
We understand switching to a heat pump is a big decision — especially here in Wales, where the weather (and the bills) can be unpredictable. That’s why we’re proud to share what some of our local customers had to say after choosing Celtic Green Energie.
“I was really unsure if a heat pump would keep us warm through a Welsh winter. But it’s been brilliant — warm, quiet, and reliable. We haven’t touched the boiler since!” — Gareth, Brecon
“I thought it would be loud and stick out like a sore thumb, but it’s surprisingly quiet and blends into the garden. You barely notice it’s there.” — Carys, Carmarthen
“The £7,500 grant made a huge difference. With the savings on our heating bills, we’re already seeing the benefits — and Celtic Green made the process hassle-free.” — Rhys & Elin, Swansea
Heat pumps aren’t just greener — they’re cheaper to run. Here’s how a typical home’s annual heating costs compare across energy sources in April 2024.
| Heating System | Energy Cost (p/kWh) | Efficiency (%) | Estimated Running Cost (p/kWh) | Typical Annual Cost (£) |
| Ground Source Heat Pump | 27 | 450 | 6 | £880 |
| Air Source Heat Pump | 27 | 350 | 8.1 | £1170 |
| Mains Gas | 7 | 89 | 7.9 | £1200 |
| Oil Boiler | 10 | 92 | 10.9 | £1650 |
| Electric Heating | 27 | 100 | 27 | £4100 |
| LPG Boiler | 14 | 89 | 15.8 | £2400 |
Got Questions? We’ve Got You Covered.
Switching to a heat pump is a big step — but it doesn’t have to be confusing. Here are the answers to the questions we’re asked most by homeowners in Wales
Yes if you own your home, live in Wales, and your EPC (Energy Performance Certificate) doesn’t recommend loft or cavity wall insulation, you’re likely eligible. We’ll confirm during your free assessment.
Most residential systems range from £8,000 to £14,000 before the grant. With the BUS grant applied, many customers pay between £5000 and £6,500 depending on system size and property type.
Air source heat pumps are typically installed in 2 to 3 days. Larger systems or complex installs may take slightly longer. We provide a full timeline during your survey
Yes. Heat pumps are over 300% efficient, meaning they produce more heat than the electricity they use. Customers often save £500–£1,000 per year compared to oil or electric heating.
Yes. As long as your home is well insulated, a modern air source heat pump can work efficiently in older properties. We check suitability during your free site visit
Possibly. Heat pumps run at a lower temperature than gas boilers, so we assess your current system and may recommend larger radiators or underfloor heating for efficiency.
Yes — air source heat pumps are designed to extract heat even in temperatures as low as -15°C. They’re ideal for the UK climate
Not at all. Modern units are quiet-running and are usually no louder than a kitchen fridge when installed correctly outside your home. We install the NIBE heatpump which is the quietest Heat pump on the market.
At Celtic Green Energie, we simplify the transition to renewable heating by managing the entire Boiler Upgrade Scheme (BUS) grant application on your behalf. As certified installers, we ensure all requirements are met, making the process hassle-free for you.
Full grant application support – we take care of all the paperwork
Expert installation of high-quality heat pumps
Transparent pricing with no hidden costs
Additional savings through our partnership with Octopus Energy
Let us help you secure the £7,500 BUS grant and upgrade to an energy-efficient heating system with ease.
Don’t miss out on government funding for heat pumps in Wales. Let Celtic Green Energie help you secure your BUS grant and transition to a greener, more energy-efficient home.