HVAC system remote monitoring and diagnosis

摘要

A method of operating a heating, ventilation, or air conditioning (HVAC) monitor-ing service is described. The method includes: providing a local device for instal-lation in an HVAC system of a residential or commercial building; periodically re-ceiving data from the local device across a wide area network, wherein the re-ceived data includes electrical sensor data including at least one of current or power; and storing the received data. The method further includes: analyzing the stored data to selectively identify problems and selectively predict faults of the HVAC system; receiving a subscription fee corresponding to the building, the subscription fee applying to a calendar period; and during the calendar period, providing information on the identified problems and the predicted faults to a customer corresponding to the building.