One of the biggest energy eaters in households is heating. You can reduce costs not only by suitable insulation of the building, replacement of windows, but you can save quite significantly just by setting the comfort temperature.
According to expert calculations, by reducing the required temperature by one degree Celsius, you can save up to 10 percent of the total annual cost. Turning off the heating in unused rooms will also help reduce costs. It is also advisable to turn off the heating at night. Not only will you save, but you can sleep better in a colder room (around 18 degrees Celsius).