www.trustcorgi.com - The national watchdog for gas safety in the United Kingdom
www.oftec.co.uk - Promoting excellence in oil heating and cooking
www.lowcarbonbuildings.org.uk - Provides grants for low carbon buildings
www.sustainable-nrg.co.uk - Manufactures of renewable energy products
www.daikin.co.uk - Manufactures of air conditioning products
www.mercerdesign.co.uk - United Heating's website designers