Question to the Department for Business, Energy and Industrial Strategy:

To ask the Secretary of State for Business, Energy and Industrial Strategy, what estimate his Department has made of the number of households that require a mains electricity and fuse upgrade to install a heat pump.

In the ‘Ten Point Plan for a Green Industrial Revolution’, my Rt. Hon. Friend the Prime Minister announced our aim to install 600,000 heat pumps a year by 2028. We estimate that, in all future heat scenarios, we will need to hit this target to remain on track for net zero. We must therefore act now to scale up supply chains and build the UK heat pump market.

Our analysis of off gas grid homes suggests that around 70% to 80% of homes would have sufficient energy efficiency and internal fuse limit electrical connections to accommodate a low temperature heat pump system. This potentially rises to around 80% to 90% with fabric upgrades including draught-proofing, cavity wall insulation, floor and loft insulation, and/or more major upgrades such as external wall insulation.