Patent attributes
An HVAC controller, in one embodiment, may include a gas valve interface and an AC unit switch interface, and a controller that may communicate with at least one of the gas valve and the AC unit switch. An identification module may identify one or more time periods when energy consumption is not likely to occur or is likely minimal, and a calibration module may open and close the at least one of the gas valve and the AC unit switch according to calibration schedule data. A computational module may calculate a computed flow rate for the at least one of the gas valve and the AC unit switch based on a calibration open time, a calibration close time, and the actual energy usage data for usage that occurred between the calibration open time and the calibration close time. The computed flow rate may be utilized to identify anomalies and provide notifications thereof.
