Question to the Ministry of Housing, Communities and Local Government:

To ask the Secretary of State for Housing, Communities and Local Government, whether modern high heat retention storage heaters meet the requirements for Part L Building Compliance in SAP 10.3.

Energy efficiency requirements for new dwellings and buildings in England are set through the Building Regulations, which specify overall performance standards rather than mandating particular technologies.

Building regulations are devolved, and standards in Scotland, Wales and Northern Ireland are determined by the respective Devolved Administrations.

Approved calculation methodologies, such as the Standard Assessment Procedure (SAP 10.3), are used to demonstrate compliance with these standards. Compliance is assessed at the level of the dwelling as a whole, allowing designers and developers to select the most practical and cost-effective heating systems for their developments.