Engaging with BuildingFit™ is a recommendation and not a requirement for our optimization. Many Building Management Systems (BMS) and Building Automation Systems (BAS) capture active energy consumption of Chiller Plants and HVAC equipment to the hour, and in some cases they archive historical consumption data for a trailing year or more. Since amps x volts x power factor = watts, we can determine the kW consumption and normalize it to weather conditions. Building Fit makes our job easier and serves as a third party to give customers confidence in the performance compensation of our work.