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

O N L I N E V E R S I O N Contents Introduction i What is an approved document? i How is construction regulated in England? i How do you comply with the Building Regulations? i What do the Building Regulations cover? ii When must a building control body be notified? ii How to use this approved document iii Where to get further help iv Section 0: Introduction 1 Summary 1 Application 2 Selected key interactions with other parts of the Building Regulations 5 Regulations 24, 25, 25B, 26, 26C, 27 and 27C: Energy performance of building calculations 6 Intention 8 Section 1: Calculating the target primary energy rate and target emission rate 9 Section 2: Calculating the building primary energy rate and building emission rate 10 Building control notification 10 Heating in the building primary energy rate and the building emission rate calculations 11 Management and control features in the building primary energy rate and the building emission rate calculations 12 Achieving the target primary energy rate and target emission rate 13 Special considerations when calculating building primary energy rate and building emission rate 13 Buildings with low energy demand 17 Regulation 25A: Consideration of high-efficiency alternative systems 18 Intention 19 Section 3: Consideration of high-efficiency alternative systems 20 Requirement L1(a): Limiting heat gains and losses 21 Intention 21 v Building Regulations 2010 Approved Document L Volume 2, 2021 edition O N L I N E V E R S I O N