Renewable Energy: Heating

Department for Business, Energy and Industrial Strategy written question – answered on 1st April 2021.

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Photo of Lord Vaux of Harrowden Lord Vaux of Harrowden Chair, Finance Committee (Lords), Chair, Finance Committee (Lords)

To ask Her Majesty's Government what assessment they have made of the level of Seasonal Coefficient of Performance which is achieved by air and ground source heat pumps in real-life installations compared to those stated in the Microgeneration Certification Scheme Product Directory; and what plans they have (1) to introduce a requirement that real-life performance and efficiency must be stated by manufacturers in advertising and technical literature, and (2) to ensure that purchasers and installers are able to make a realistic assessment of the likely running costs.

Photo of Lord Callanan Lord Callanan Parliamentary Under-Secretary (Department for Business, Energy and Industrial Strategy)

Based on historic evidence from trials we can assume that air source heat pumps have a Seasonal Coefficient of Performance of 2.4, while ground source heat pumps have a coefficient of 2.7. We are currently seeking to update our assumptions based on real-life data from the Electrification of Heat Demonstration Project and the Metering and Monitoring Service Packages, installed as part of the Renewable Heat Incentive.

We understand that there may be a performance gap between stated efficiency and real-life efficiency. This is something we are seeking to address by working with the standard setting bodies to improve the accuracy of these measurements. We are also looking to develop a Home Suitability Model, as part of the Electrification of Heat Demonstration Project, to more clearly communicate to the public the expected running costs of heat pumps based on real-life performance.

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