The HeatingSave Energy Monitor is a Zig 2.4 Mhz wireless mesh network wireless management systemthat collects information from sensors placed in a building. Originally developed for the BRE, the system can collect up to 6 times a minute internal and external temperature, relative humidity, energy usage, carbon dioxide, light levels, watts per meter radiation, noise levels, volatile organic compounds and other environmental data along with information on how the heating system works. The heat-loss algorithms and other HeatingSave features such as TRV's also allow the HeatingSave monitor to be turned into an energy and security management system proved to cut heating bills by between 20% and 50%.