www.bre.co.uk - Building Research Establishment (BRE) - Includes 'Centre for Sustainable Construction' providing expertise to help reduce environmental impact and associated costs spanning the whole life cycle of a building.
www.freesource.co.uk - Freesource Energy - Designers, suppliers and installers of renewable energy technologies
www.icax.co.uk - Icax Ltd - Interseasonal Heat Transfer combines solar collection in summer with heat storage in ThermalBanks to double the Coefficient of Performance of ground source heat pumps in winter
www.r-e-a.net - Renewable Energy Association - UK's largest renewable energy association
www.superhomes.org.uk - The Sustainable Energy Academy promotes education and action to reduce the carbon footprint of buildings and communities. It is currently spearheading Old Home SuperHome, which is a network of exemplar, old dwellings which have undergone an energy-efficiency retrofit.