Press Association: The average home can save £270 a year by being energy efficient, according to the Energy Saving Trust. The organisation offers these tips to help people cope with rising energy prices. * Look for cavities – around 33% of the heat lost in an uninsulated home is through the walls, so insulating them can be one of the most cost-effective ways to save energy in the home. Not all buildings are suitable, but if a house was built between the 1920s and 1980s it could be a candidate for …