Guardian: Heating Space-heating accounts for 57% of a house’s energy use, so it is the first place to look to economise. Wear more, heat less Cutting your thermostat temperature by just one degree will shave 10% off your heating bill. For a really skinny bill, pile on the layers and drop it to 18C. Insulation, insulation, insulation Ask the local council about schemes for help, or call the Energy Saving Trust (0800 512 012, est.org.uk). Insulating a loft will save …