Part L2A

NBS Building Regulations - Main changes in the 2014 edition

 

1701_APPWAL_L2A_00010

Main changes in the 2014 edition

Main changes in the 2014 edition

 

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  [ CIS link: Building Regulations 2010.  Statutory Instruments SI 2010/2214 ] . Regulation 2(1) of the Building Regulations  [ CIS link: Building Regulations 2010.  Statutory Instruments SI 2010/2214 ] defines the energy efficiency requirements as the requirements of regulations 23, 25A, 25B, 26, 26A, 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. Developers are however free to vary the specification, provided the same overall level of primary energy consumption and carbon dioxide emissions is achieved or bettered.

The document consolidates the amendments made in


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