Replace your high-burning fossil-fuel boiler or electric heater with up to 400% efficient air source heat pump at our best quote. We will apply for £7,500 voucher to the Ofgem on your behalf and reflect this benefit to you with up to 70% less upfront cost. If you have a valid EPC, make this retrofit heating upgrade more affordable and reduce your heating bills by up to 20%.
Our experts will work with you to make sure you qualify for the £7,500 grant before installing the Air-to-Water heat pump so that you will be absolutely clear on how much you will be paying.
| Existing Heating System | Energy Consumption | Heating Bill Before Switch | Heating Bill After Switch | Your Annual Savings |
|---|---|---|---|---|
| LPG boiler | 1,994 L of LPG (£0.79/L) | £1,575 | £1,108 | £468 |
| Electric boiler | 10,000 kWh (27.693p/kWh) | £2,769 | £1,108 | £1,661 |
| Storage heaters | 9,000 kWh (18p/kWh mix of day/night tariff) | £1,620 | £1,108 | £512 |
| Electric panel heaters | 10,000 kWh (27.693p/kWh) | £2,769 | £1,108 | £1,661 |








Fill out a simple form to let us know whether you meet the BUS application requirements.
We'll schedule a surveyor who will make a retrofit design after a technical assessment of your property.
After your consent to the Ofgem email, choose your preferred date when our expert install heat pump.
If you make a retrofit heating system upgrade through Grant Boilers, we will apply to the Boiler Upgrade Scheme (BUS) for £7,500 voucher on your behalf. The scheme will cover part of the cost of replacing a fossil fuel or electric heating system with an air source heat pump including smart controls, and radiators if required. Whether you live in domestic or non-domestic property located in England & Wales, this retrofit improvement becomes affordable with government heating grant.







Insulation was recommended only before May 8, 2024. So, now you can still get the air source heat pump installed at your property. However, it is still advisable to install insulation because the advantage of a heat pump (saving energy) will only be possible with proper insulated property
If all of your properties meet the criteria, you will definitely get an air source heat pump installed at all those properties.
Yes, you can be eligible if your property is self build, because in this case EPC is not required.
Yes, if the existing boiler was installed without any government funding or support, it can be replaced with an air source heat pump under the Boiler Upgrade Scheme.
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