Heating the whole house can be wasteful: often, every room is heating, but most remain unoccupied. By turning down radiators in rooms that are not being used with Lightwave Radiator Valves, significant energy can be saved.
Reduce demand on the boiler
Energy is saved because demand on the boiler, and the rate at which fuel is being burned is reduced. When you consider that a radiator at maximum output can expend as much energy as an electric fire or kettle, it is easy to see how a bit of extra control can help to save energy and money.