Building Regulations 2010: Approved Documents L2A (draft) Conservation of fuel and power in new buildings other than dwellings (2014 edition) (draft)

Publication Year

2014

Document Status

Withdrawn

Abstract

Provides guidance for complying with energy efficiency requirements in common building works to new non-domestic buildings and covers: five criteria for complying with the energy efficiency requirements, how to calculate and ensure targets are not exceeded for the primary energy consumption and CO2 emissions rates, setting minimum energy efficiency standards for building fabric and services, how to reduce the risk of overheating in buildings, procedures to ensure the actual performance of the constructed building is as designed, information for the occupier, which buildings are exempt from the energy efficiency requirements and procedures for notifying building control.

Document History

For use in Wales. This is a draft copy and should not be used in place of DCLG Conservation of fuel and power in new buildings other than dwellings (2010 edition incorporating further 2010 amendments). The Approved Documents current on 31 December 2011 will continue to apply to Wales. As guidance is reviewed and changes made the Welsh Government will publish separate documents. Comes into effect July 2014 Main changes in the 2014 edition: This approved document, Approved Document L2A: Conservation of fuel and power in new buildings other than dwellings supports the energy efficiency requirements of the Building Regulations. Regulation 2(1) of the Building Regulations defines the energy efficiency requirements as the requirements of regulations 23, 25A, 25B, 26, 26B, 28, 29 and 40 and Part L of schedule 1. It takes effect on 31 July 2014 and is for use in Wales. The 2010 edition will continue to apply to work begun before 31 July 2014, or to work subject to a building notice, full plans application or initial notice submitted before 31 July 2014. The main changes in the approved document are that: a new requirement, regulation 26A, has been introduced that requires new non-domestic buildings to achieve or better the target primary energy consumption rate. The Part L 2014 specifications have been strengthened to deliver 20% carbon dioxide savings across the new non domestic build mix relative to Part L 2010. A wider set of notional buildings has now been defined for top-lit, side-lit (heated only) and side-lit (heated and cooled) buildings. The notional building air permeability has been further sub-divided by size. A summary of the Part L 2014 elemental specification of these notional buildings is published at Appendix B in the Approved Document. If the actual building is constructed entirely to the notional building specifications it will meet the carbon dioxide and primary energy consumption targets and the limiting values for individual fabric elements and building services. The document consolidates the amendments made in SI 2013/747 requiring the feasibility of high efficiency alternative systems to be taken into account before construction commences. The guidance for insulation of circulation pipes within communal spaces is given greater prominence. The document is in a new style format.

ISBN

9781473409583

Publisher Information