Patent ID: 7204429

Claim:
A method of controlling a blower/fan motor in a forced-air HVAC system to substantially maintain an absolute temperature in an interior space, said method comprising the steps of: measuring a temperature in said interior space; communicating the absolute temperature to a controller; when the absolute temperature is higher than said temperature in said interior space, causing said controller to call for heated air from said system; when the absolute temperature is lower than said temperature in said interior space, causing said controller to call for cooled air from said system; varying continuously a speed of said blower/fan motor in response to said call for said heated or said cooled air, whereby said blower/fan motor runs substantially continuously once it starts; said step of varying resulting in a blower/fan motor speed responsive to a temperature sensed in a plenum chamber of said system when said call is for said heated air; and said step of varying resulting in a blower/fan motor speed responsive to a temperature sensed in a cooling coil of said system when said call is for said cooled air.