1. The Building Regulations 2000. Approved document L2A. Conservation of fuel and power in new buildings other than dwellings. 2010 edition. The Stationery Office. Free download available.
2. BS EN ISO 13789:1999 Thermal performance of buildings – Transmission heat loss coefficient – Calculation method.
3. National Calculation Methodology (NCM) Modelling Guide (for buildings other than dwellings in England). 2013 Edition. April 2014.
