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

O N L I N E V E R S I O N R24-27C Internal lighting in the dwelling emission rate and dwelling primary energy rate calculations 2.15 The calculations for both the dwelling primary energy rate and dwelling emission rate should account for the efficacy of lamps installed in the fixed lighting locations. Achieving the target primary energy rate, target emission rate and target fabric energy efficiency rate 2.16 Provided the dwelling satisfies the minimum standards for fabric elements set out in Section 4, the designer can achieve the target primary energy rate and the target emission rate by using any combination of the following. a. Fabric energy efficiency. b. Efficient building services. c. Low and zero carbon technologies integrated in an appropriate mix. 2.17 The designer can achieve the target fabric energy efficiency rate only through fabric energy efficiency. NOTE: To meet the target fabric energy efficiency rate, the energy efficiency of some elements will need to be significantly better than the minimum standards for fabric elements set out in Section 4. Building Regulations 2010 Approved Document L Volume 1, 2021 edition 17 O N L I N E V E R S I O N