Changes made to the Renewable Heat Incentive scheme in 2017 introduced RHI heat demand capping.

The idea behind RHI heat demand capping was to provide fairer disruption of the overall subsidy allocations. In effect, capping meant a limit on the total subsidy a domestic renewable heating installation was eligible to claim.

What are the Capping Limits?

The RHI heat demand capping for ground source heat pump installations is at 30,000kWh.

The RHI heat demand capping for ground source heat pump installations is at 30,000kWh.

What do the Heat Demand Caps mean?

The domestic Renewable Heat Incentive is a deemed tariff.

Payments are calculated based on assumed heat demand figures taken from an Energy Performance Certificate (EPC). If the combined space heating and hot water demand figures on an EPC exceed either of the above thresholds, a limit to the RHI subsidy that can be claimed is triggered.

For example, a customer’s home has a space heating and hot water demand of 23,500kWh. They chose to install an air source heat pump and claim the RHI. The maximum subsidy they could claim against would be 20,000kWh. The homeowner could not claim against the surplus 3,500kWh.

How can you find out your home’s heating demand?

Homes rented or sold within the last 10 years will likely have an existing EPC.

Click here to check the online National Energy Performance Certificate database. No EPC? No problem.

EPC’s must be no older than 24-months to claim RHI. As such, most homes will require a new EPC. A renewable heating installation will often include the issuing of a new EPC certificate.

GreenGen recommends having the EPC certificate produced prior to installation to confirm your heat demand figures and Renewable Heat Incentive payments. In addition, this should give customers peace of mind prior to their investment.

Commonly, an EPC assessment costs around £65.