Insulation and boilers

Whether you want to help the planet or just save money, there's always something you can do to make your home more energy efficient

Eco homes and useful contacts

7. Ground source heat pumps

GSHPs transfer the heat absorbed by the earth's surface into a heating system using plastic pipes filled with water and anti-freeze. The pipes are buried in the ground so installation requires the garden to be dug up. They operate best with underfloor heating as they work at a lower temperature than radiators (about 40°C). They cost £6,500 to £9,500 but, once in, should last around 40 years.

8. New-build eco homes

Of course, you could just buy a house with the hard work already done for you. Green Moves (0845 094 2620; www.greenmoves.com) advertises energy-efficient homes for sale around the UK, while progressive companies like ZEDfactory and Living Villages are creating exciting developments that aim to minimise the harm we're doing to the environment.

9. Self-build eco homes

If you're really dedicated, a self-build could give you your dream green pad. Walls can be built out of sustainable materials such as wood; sheep's wool or recycled newspaper can be used to insulate; energy needs met by solar and wind power; and rainwater used to flush loos and water gardens. Eco architects like Forever Green are the starting point for many self-builders.

USEFUL CONTACTS

Energy Saving Trust

Low Carbon Buildings Programme for grants for eco-friendly systems

British Wind Energy Association

Centre for Alternative Technology

Thermafleece from Second Nature for sheep's wool home insulation

Worcester Bosch for energy-saving products including boilers and GSHPs

Solar Century for solar energy systems

ZEDfactory

Living Villages

Forever Green

Read more articles on Eco at home