Conservation of fuel and power: Approved Document L, Volume 2 — Buildings other than dwellings

R24-27C O N L I N E V E R S I O N NOTE: Where the building control body is an approved inspector, see regulation 20 of the Building (Approved Inspectors etc.) Regulations 2010 (as amended). Intention Regulation 24 Regulation 24 requires the Secretary of State to approve a methodology of calculation of the energy performance of a building. Approved tools for implementing this methodology for new non-domestic buildings are the Simplified Building Energy Model or other software tools approved under the Notice of Approval. Calculation methodologies are set out in Section 1 and Section 2 of this approved document. Regulation 25 Regulation 25 requires the Secretary of State to approve minimum energy performance requirements. These requirements are in the form of a target primary energy rate and a target emission rate. The targets are set out in Section 1 of this approved document. Regulation 25B The Secretary of State considers that a building has a very high performance rate for the purposes of the definition of a nearly zero-energy building if both of the following are met. a. The building meets the target emission rate required under regulation 26. b. Both: i. An analysis is made of the technical, environmental and economic feasibility of using high efficiency alternative systems, which include decentralised energy supply systems based on energy from renewable sources. ii. This analysis is considered as required by regulation 25A. Regulations 26 and 26C A newly constructed building must be shown to meet regulations 26 and 26C by producing calculations to show that the building meets both of the following. a. Target primary energy rate. b. Target emission rate. Section 2 of this approved document sets out how to produce these calculations. Regulations 27 and 27C Both before and after a newly constructed building is built, a notice must be given to the building control body of the calculations. 8 Approved Document L Volume 2, 2021 edition Building Regulations 2010 O N L I N E V E R S I O N