If your house is centrally heated, you can make the heating more efficient and less expensive by upgrading your heating controls. A time switch or programmer allows you to set heating and hot water to come on only at times when needed. Room thermostats which automatically switch the heating off at a certain temperature will also save energy. Similarly, individual radiator thermostats can be fitted which allow you to control each room's temperature separately.
One of the biggest causes of high fuel bills and energy inefficiency comes from old boilers, generally those over 15 years old. All modern boiler systems are more energy efficient and use less fuel to run. The most efficient boilers in terms of saving money are called condensing boilers which use 30-40% less fuel. Only A Rated Boilers are allowed to be fitted Now. Click Here for more information on Boiler Efficiency.