Heat pump support in energy performance certificates

Questions to the Mayor of London – answered on 13th September 2021.

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Photo of Zack Polanski Zack Polanski Green

Are you aware of concerns that heat pumps are not well supported by present Energy Performance Certificate (EPC) approaches, and have you taken any steps to influence change?

Photo of Sadiq Khan Sadiq Khan Mayor of London

I understand that this is because the main Energy Performance Certificate (EPC) rating is based on energy cost savings rather carbon savings, and the EPC methodology assumes that the operating cost for an efficient gas boiler is less than for a heat pump, so a gas boiler will get recommended in an EPC ahead of a heat pump.

There are further issues associated with EPCs in that they use modelled rather than actual energy consumption data, and the regulations are poorly enforced. My response to the consultation on the Non-Domestic Private Rented Sector Minimum Energy Efficiency Standards outlined in detail some of these issues with EPCs and the need for reform. My response to the consultation on the Future Homes Standard also outlined the need to update the SAP emissions factors urgently, which are part of the issue for heat pumps in EPCs.