With a HeatingSave Building Energy Management system a small computer based unit replaces the function of the boiler time clock and uses temperature probes to constantly read the temperature of various parts of the heating system. This data is then fed into a mathematical algorithm that calculates the latest time each day to switch on the heating system, thereby severely cutting CO2 emissions. Simply choose the room temperature and the hot water you want, and when, and HeatingSave does the rest, giving you comfort, energy savings and peace of mind. It works on most types of gas and oil fired boilers, now solid fuel ones too.