Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, whether his Department has made a recent assessment of the (a) efficiency and (b) reliability of ground source heat pumps in residential properties.

As part of the Electrification of Heat Demonstration Project, the Department funded the installation of 38 ground source heat pumps in residential properties across the UK, with monitoring equipment to assess the performance of the systems in situ. The Government expects the final performance data from this project, including data on the ground source heat pumps installed, to be published after the project concludes, in summer 2024.