Thank you for contacting me about heat pumps.
The argument for the 45kW cap is that this will target support where upfront costs are a particular barrier in transitioning to low-carbon heat. Typically, these installations are in households or small and medium-size enterprises.
In the recent Budget, the Chancellor announced a £270 million Green Heat Network Fund which will fund large-heat pumps, solar thermal installations and waste-heat recovery in heat networks between 2022 and 2025. The Government will be consulting later this year on scheme design which will offer the sector to make the case for supporting larger heat pump projects.
Thank you again for taking the time to contact me. I understand the concerns you have raised and will feed this back to ministers.