To assist with meeting the Requirements of Part L - Conservation of fuel and power, there are a number of tools and documents available:
National Calculation Methodologies
This publication documents the approved methodologies and software programs that can be used to produce Energy Performance Certificates (EPCs), Display Energy Certificates (DECs) and Air Conditioning Inspection Reports (ACIRs).
- Notice of Approval of the methodology of calculation of the energy performance of buildings in England and Wales
Part L 2013 - Where to start: An introduction for house builders and designers.
As a starting point for design and specification, these NHBC Foundation guides, supported by MHCLG, looks at the implications of the Part L and includes examples of typical homes.
The guides present a number of options from which the house builder or designer can explore the best and most cost-effective Part L solutions.
- View the guides on the NHBC Foundation website (registration required)
Low or Zero Carbon Energy Sources: Strategic Guide
This Strategic Guide is intended to support the inclusion of Low or Zero Carbon (LZC) energy sources in Part L and Approved Documents ADL1A, ADL1B, ADL2A, and ADL2B of the Building Regulations.
The thermal performance of multi-foil insulation
This paper reports the results of in-situ measurement of the U-values of some constructions incorporating a multi-foil insulation product. The results are compared with values that have been reported elsewhere for the thermal performance of the product. The in-situ results are generally in good agreement with the result of a hot-box test.
Gas and oil central-heating boilers - Advice to householders
Information leaflet on the raising of energy performance standards for new and replacement gas-fired hot-water central-heating boilers, as of 1 April 2005.
Guide to the Condensing Boiler Installation Assessment Procedure for Dwellings
This Guide has been written to help heating installers carry out a condensing boiler installation assessment using the procedure as set out in Appendix A to the Domestic Heating Compliance Guide (2nd Edition) of December 2008.