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

O N L I N E V E R S I O N R25A Regulation 25A: Consideration of high- efficiency alternative systems This section deals with the requirements of regulation 25A of the Building Regulations 2010. Regulation Consideration of high-efficiency alternative systems for new buildings 25A. (1) Before construction of a new building starts, the person who is to carry out the work must analyse and take into account the technical, environmental and economic feasibility of using high-efficiency alternative systems (such as the following systems) in the construction, if available— (a) d ecentralised energy supply systems based on energy from renewable sources; (b) cogeneration; (c) d istrict or block heating or cooling, particularly where it is based entirely or partially on energy from renewable sources; and (d) heat pumps. (2) The person carrying out the work must— (a) n ot later than the beginning of the day before the day on which the work starts, give the local authority a notice which states that the analysis referred to in paragraph (1)— (i) has been undertaken; (ii) is documented; and (iii) the documentation is available to the authority for verification purposes; and (b) e nsure that a copy of the analysis is available for inspection at all reasonable times upon request by an officer of the local authority. (3) A n authorised officer of the local authority may require production of the documentation in order to verify that this regulation has been complied with. (4) The analysis referred to in paragraph (1)— (a) m ay be carried out for individual buildings or for groups of similar buildings or for common typologies of buildings in the same area; and (b) i n so far as it relates to collective heating and cooling systems, may be carried out for all buildings connected to the system in the same area. 18 Approved Document L Volume 1, 2021 edition Building Regulations 2010 O N L I N E V E R S I O N