1. International Energy Agency (IEA). Energy consumption by sector [Online]. Available: http://www.eia.doe.gov/emeu/aer/pdf/pages/sec2.pdf [accessed 21.12.09].
2. Directive of the European parliament and of the council on the energy performance of buildings;EPBD Directive 2002/91/EC;The European Community Official Journal,2003
3. Department of Energy and Climate Change. Climate change act 2009 impact assessment; March 2009.
4. Building a low-carbon economy – the UK's contribution to tackling climate change;Committee on Climate Change (CCC),2008
5. Technical options and strategies for decarbonizing UK housing;Lowe;Building Research & Information,2007