The Building Energy Management system takes into account a series of important factors such as internal and external temperatures, day-to-day energy usage, occupancy, etc. Despite of an initial cost, savings of up to 30%+ in terms of energy bills will be immediately visible. In fact, the HeatingSave system also displays the cost of the energy they are consuming, for current and previous days, together with the amount of CO2 they have produced on those days; all on a very easy to use monitor screen.