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

To ask the Secretary of State for Housing, Communities and Local Government, what assessment he has made of the potential impact of (a) building regulations and (b) planning policy on levels of installation of air conditioning in new build homes.

Part O of the Building Regulations, which was introduced in June 2021 and came into force in June 2022, ensures new homes are designed to minimise the risk of overheating.

Given the Government’s net zero commitment, our preferred means of mitigating overheating is through passive measures, which ensure little or no energy is required to manage indoor temperatures. While mechanical cooling, such as air conditioning, is effective at reducing overheating, it is not a desirable or financially efficient solution due to the energy it consumes. Widespread reliance on mechanical cooling would place additional demand on the national grid, slowing the transition to a zero-carbon system and requiring further generation capacity. There are also implications for households, as the costs associated with mechanical cooling could exacerbate fuel poverty where people are unable to afford to run cooling systems.

Mechanical cooling can still be used to comply with Part O. However developers must first demonstrate that all reasonable passive measures have been implemented before adopting mechanical solutions.