Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, with reference to the Department for Energy Security and Net Zero press release entitled “Families set to save money through new and upgraded heat networks”, published on 23 September 2026, what estimate has been made of the proportion of heat supplied through the funded networks that will come from waste heat sources.

For the five Green Heat Network Fund projects included in the Government’s announcement, the proportion of heat delivered from waste heat sources is estimated at approximately 57% of heat delivered.

The Heat Network Efficiency Scheme projects included in the Government’s announcement predominantly use natural gas boilers as their heat sources.