1. Dunster Wood Fuels – biomass boilers and accumulator tanks capable of storing large volumes of cheap hot water (www.dunsterwoodfuels.co.uk). 2. The National Energy Foundation – advice on reducing carbon emissions through using energy efficiency measures and renewable energy sources (www.nef.org). 3. The Centre for Alternative Technology (CAT), an ecocentre in Wales dedicated to demonstrating and teaching sustainable development (www. cat.org.uk). 4. Solartwin – reliable, easy-tofit and affordable solar panel water heating systems (www. solartwin.com). 5. Clearview – a leading manufacturer of clean-burning wood and multifuel stoves (www. clearviewstoves.com). 6. Energy Crops – a co-operative of wood pellet fuel producers, providing a local supply of high quality fuel with the security of a national network (www.energycrops.com). 7. Alvesta – a national designer, provider and installer of renewable energy systems for buildings of all types (www. alvestaltd.com). 8. Heat recovery ventilation and air-source heat pumps are used to heat Emma Gordon-Lee’s Danish eco-home (www.genvex. co.uk). 9. Solar hot water systems can supply up to 70 per cent of your annual hot water requirement (www.genersys.com). 10. Switch to a renewable electricity tariff; all the power you use is attributable to renewable source, such as wind, running water and the sun (www. good-energy.co.uk).