Patent ID: 8353463

Claim:
A method of heating air in an air handler from hot water generated in a water heater comprising: receiving a call for heated air; automatically initiating operation of a pump associated with the air handler; continuing operation of the pump for a predetermined first period of time; detecting whether a flow of water through the pump is at a predetermined level sufficient to generate heated air from the hot water; responsive to detecting that flow of water through the pump is not at a predetermined level sufficient to generate heated air from the hot water, terminating operation of the pump for a predetermined second period of time and then repeating the initiating, continuing and detecting steps; responsive to detecting that flow of water through the pump is at a selected predetermined level sufficient to generate heated air from the hot water, maintaining the pump in operation; initiating operation of at least one of a blower and a fan to supply heated air generated by heat exchange with the hot water; and automatically terminating operation of at least one of the pump, the blower, and the fan when the call for heat is satisfied.