Renewable Heat Incentive?

The RHI was designed to cover the additional cost of installing this technology over the cost of installing a traditional boiler. A well designed system will give you cost savings which added to the RHI payments mean you may get your money back during the term of the RHI.

The Domestic RHI scheme pays you for the heat you are deemed to require to heat your property as shown in the EPC, less the electrical energy you a deemed to need to produce the heat. This is the eligible heat and it is capped at 20,000 kWh per annum for air source heat pumps and 30,000 kWh per annum for ground source heat pumps. So if the EPC says you need 30,000 kWh for heating and hot water and we design a ground source heat pump system which will give you 350% efficiency you will get paid for 30,000 kWh less 30,000 divided by 350% for electricity so that is 30,000 – 8,571 = 21,429 kWh x the tariff which applies to your installation.

Current tariffs are 10.92 pence per kWh for Air Source Heat Pumps and 21.29 pence per kWh for ground source heat pumps.

So that is 21,429 x 21.29 = £4562.23 per year for seven years for a ground source heat pump totalling £31,935. For an air source heat pump the eligible heat is capped at 20,000 kWh so that is 20,000 - 5714 = 14286 x 10.92 which is £1560.03 per year for seven years which comes to £10,920

If your EPC says your house needs 20,000 kWh per year for heating and hot water then it would be 20,000 – 5,714 kWh = 14,286 kWh x 10.92 = £1560.03 per year for an air source heat pump and £3,041.49 per yeasr for a ground source heat pump. That would be £10,920 and £21,293 respectively.
https://www.ofgem.gov.uk/environmental-and-social-schemes/domestic-renewable-heat-incentive- domestic-rhi/contacts-guidance-and-resources/tariffs-and-payments-domestic-rhi

• Air source: YES
• Ground source: YES
• Domestic installs: YES
• Commercial installs: YES
• Payback period: 7 years