Patent ID: 8662404

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