Approved Documents L1A, L1B, L2A and L2B: Conservation of fuel and power
Approved Documents provide guidance on how to meet the building regulations.
Parts L1A, L1B, L2A and L2B contain guidance on the conservation of fuel and power.
The Approved Documents can be downloaded below and there are two additional compliance guides for building services additional further down.
Approved Document L2A: Conservation of fuel and power in new buildings other than dwellings
Approved Document L2B: Conservation of fuel and power in existing buildings other than dwellings