Patent ID: 7788936
Filing Date: 2010-09-07
Classification: F24F,G05D,Y02B

Abstract:
1. A method of operating a fan of an HVAC system, wherein the HVAC system is controlled, at least in part, by two or more control signals provided by a thermostat including a fan control signal, wherein during normal operation, the fan control signal causes the fan to operate with at least a first fan “on” time period followed by a first fan “off” time period, followed by a second fan “on” time period, the method comprising the steps of: generating a random or pseudo random fan start time delay; providing one or more of the control signals other than the fan control signal to the HVAC system without a delay related to the random or pseudo random fan start time delay; and providing the fan control signal with a delay that is at least related to the random or pseudo random fan start time delay in order to delay the start of the second fan “on” time period.