Approved Document L: Conservation of fuel and power - Volume 2: Buildings other than dwellings (2021 edition)

This Approved Document provides guidance on how to comply with Part L to Schedule 1 of the Building Regulations and the associated energy efficiency requirements for buildings other than dwellings, and takes effect on 15 June 2022. It does not apply to work subject to a building notice, full plans application or initial notice submitted before that date, provided the work is started on site before 15 June 2023.ADL2: Conservation of fuel and power - Buildings other than dwellings (2021 edition) contains the following sections:Calculating the target primary energy rate and target emission rateCalculating the building primary energy rate and dwelling emission rateConsideration of high efficiency alternative systemsLimiting heat gains and lossesMinimum building services efficiencies and controls - general guidanceSystem specific guidanceAir permeability and pressure testingCommissioningProviding informationNew elements in existing buildings, including extensionsWork to elements in existing buildingsConsequential improvementsKey termsLighting Energy Numeric Indicator (LENI)Reporting evidence of complianceMeasures for consequential improvementsHierarchy for establishing seasonal efficiencies of existing boilersThe guidance in this Approved Document only relates to England and applies to dwellings other than dwellings only. For guidance relating to dwellings, use Approved Document L, Volume 1: Dwellings.