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 d. A list of specifications used in the as-built calculations, and whether the specifications have changed from those used in the design stage calculations. Building control bodies are authorised to accept notification of (a) to (d) above as reported in the completion stage BREL report together with photographic evidence of compliance. For further details of the post-completion BREL report and photographic evidence, see Appendix B. Buildings that contain multiple dwellings 2.6 Buildings that contain more than one dwelling must comply with one of the following. a. Every individual dwelling complies with all of the following conditions. i. The dwelling primary energy rate must not exceed the individual dwelling’s target primary energy rate. ii. The dwelling emission rate must not exceed the individual dwelling’s target emission rate. iii. The dwelling fabric energy efficiency rate must not exceed the individual dwelling’s target fabric energy efficiency rate. OR b. All of the following are met. i. The average dwelling primary energy rate for the whole building, calculated in accordance with paragraph 2.6, must not exceed the average target primary energy rate. ii. The average dwelling emission rate for the whole building, calculated in accordance with paragraph 2.6, must not exceed the average target emission rate. iii. The average dwelling fabric energy efficiency rate for the whole building, calculated in accordance with paragraph 2.6, must not exceed the average target fabric energy efficiency rate. 2.7 The average dwelling primary energy rate, dwelling emission rate and dwelling fabric energy efficiency rate are the floor-area-weighted averages of the individual dwelling primary energy rate, dwelling emission rate and dwelling fabric energy efficiency rate for all the dwellings in the building. The average dwelling primary energy rate, dwelling emission rate and dwelling fabric energy efficiency rate should be calculated using the same averaging methodology. An average dwelling primary energy rate, dwelling emission rate or dwelling fabric energy efficiency rate should not be calculated across separate buildings on a site. Guidance on how to calculate an average target primary energy rate is given in paragraph 1.5. Guidance on how to calculate an average target emission rate and average target fabric energy efficiency rate is given in paragraph 1.6. NOTE: Information and photographic evidence should be provided for each individual dwelling, as described in Section 9 and Appendix B. 14 Approved Document L Volume 1, 2021 edition Building Regulations 2010 O N L I N E V E R S I O N