This edition of the guidance came into effect on 30th June 2022.
Technical Booklet F1 provides guidance on regulations 39-47 which set out the requirements for the conservation of fuel and power in dwellings. You can find out more about the differences between this version and the 2012 version it replaced by viewing this awareness briefing or consulting a list of Frequently Asked Questions
TB Part F1 - Conservation of fuel and power in dwellings – June 2022