Patent ID: 11913673
Assignee: LENNOX INDUSTRIES INC.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 18:
19. A method of utilizing a bypass duct to operate an HVAC system, the method comprising:
determining, using an HVAC controller, if the HVAC system is operating in a heating mode or an air-conditioning mode;
responsive to a determination that the HVAC system is operating in the heating mode, opening a damper arranged in the bypass duct that fluidly couples at least one of a vertically oriented and a horizontally oriented supply air duct to at least one of a vertically oriented and a horizontally oriented return air duct;
responsive to a determination that the HVAC system is operating in the air-conditioning mode, closing the damper;
determining, using the HVAC controller, if a relative humidity of an enclosed space is above a pre-determined threshold;
responsive to a determination that the relative humidity of the enclosed space is not above the pre-determined threshold, retaining the damper in a closed position;
responsive to a determination that the relative humidity of the enclosed space is above the pre-determined threshold, determining using the HVAC controller, if a speed of an indoor circulation fan can be reduced;
responsive to a determination that the speed of the indoor circulation fan can be reduced, reducing the speed of the indoor circulation fan; and
responsive to a determination that the speed of the indoor circulation fan cannot be reduced, opening the damper to reduce a volume of air supplied to the enclosed space to create an effect similar to that of reducing the speed of the variable-speed indoor circulation fan.