A BEMS is easy-to-use and offers advanced software with simple visualisation that shows you the energy that your building uses as well as how much you spend. Additionally, HeatingSave's BEMS records the pre-purge time (start-up time) for boilers, understands the burn rate and then, with figures supplied from the Carbon Trust, works out the KwH and CO2 used. Once this information is recorded, the BEMS is then able to work out your expenditure.