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

R24-27C O N L I N E V E R S I O N Shell and core developments 2.21 If a building is offered to the market as a shell for fit-out work by the incoming occupier, the developer should calculate a design-stage target primary energy rate, building primary energy rate, target emission rate and building emission rate. These calculations should be submitted to the building control body. The submission should demonstrate how the building could reasonably meet the energy efficiency requirements after fit-out. 2.22 If some systems are not installed when a building is put on the market, reasonable assumptions should be made in the calculation of the building primary energy rate and building emission rate and model for the efficiencies of services that will be installed during first fit-out work. The specification provided to the building control body should include all of the following. a. Details of the services, including any on-site electricity generation, not provided in the base build. b. The efficiency values assumed for these services. c. A statement on how access to install any services, including on-site electricity generation, will be provided during first fit-out work. 2.23 At practical completion of the base building in a shell and core development, the as-built target primary energy rate, building primary energy rate, target emission rate and building emission rate calculations should be based only on the building and systems as constructed; the fit-out areas should be assumed to be conditioned to temperatures appropriate to their designated use, but no associated energy demand included. 2.24 If an incoming occupier does first fit-out work on all or part of a building in a shell and core development by providing or extending fixed services for any of the following: a. heating b. hot water c. air-conditioning d. mechanical ventilation then a target primary energy rate, building primary energy rate, target emission rate and building emission rate submission should be made to the building control body after completion to demonstrate compliance for the part of the building covered by the fit-out work. 2.25 If fit-out work does not include providing or extending any of the fixed services for any of the following: a. heating b. hot water c. air-conditioning d. mechanical ventilation then any lighting systems that are installed should be at least as efficient as those assumed in the shell developer’s initial submission. NOTE: A new energy performance certificate is required for that part of the physical building covered by fit-out work. NOTE: Paragraph 9.12 outlines requirements for the building log book to be completed for shell and core developments when first fit-out work takes place. 16 Approved Document L Volume 2, 2021 edition Building Regulations 2010 O N L I N E V E R S I O N