Conservation of fuel and power: Approved Document L, Volume 1 — Dwellings

O N L I N E V E R S I O N L1(b), L2 Requirements L1(b)(i), (ii) and L2: Fixed building services energy efficiency and controls and on-site generation of electricity This section deals with the requirements of Part L1(b)(i), (ii) and L2 of Schedule 1 to the Building Regulations 2010. Requirement Requirement Limits on application Schedule 1 – Part L Conservation of fuel and power L1. Reasonable provision shall be made for the conservation of fuel and power in buildings by— (a) limiting heat gains and losses— (i) t hrough thermal elements and other parts of the building fabric; and (ii) f rom pipes, ducts and vessels used for space heating, space cooling and hot water services; (b) providing fixed building services which— (i) a re energy efficient to a reasonable standard; (ii) have effective controls; and (iii) a re commissioned by testing and adjusting as necessary to ensure they use no more fuel and power than is reasonable in the circumstances. On-site generation of electricity L2. Where a system for on-site electricity generation is installed— (a) reasonable provision must be made to ensure that— (i) the system and its electrical output are appropriately sized for the site and available infrastructure; (ii) the system has effective controls; and (b) it must be commissioned by testing and adjusting as necessary to ensure that it produces the maximum electricity that is reasonable in the circumstances. Building Regulations 2010 Approved Document L Volume 1, 2021 edition 33 O N L I N E V E R S I O N