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

Claim 0:
1. A heating, ventilation, and air conditioning (HVAC) system comprising:
a vertically aligned supply air duct and return air duct;
a bypass duct that fluidly couples the vertically aligned supply air duct and the return air duct;
a damper disposed in the bypass duct, the damper being moveable between an open position and a closed position;
a controller operatively coupled to the damper and disposed in an enclosed space, wherein the controller incorporates a humidity sensor for measuring a relative humidity of the enclosed space;
wherein the controller is configured to:
determine if the relative humidity measured 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, retain the damper in the closed position;
responsive to a determination that the relative humidity of the enclosed space is above the pre-determined threshold, determine if a speed of a variable-speed indoor circulation fan can be reduced;
responsive to a determination that the speed of variable-speed indoor circulation fan can be reduced, reduce the speed of the variable-speed indoor circulation fan; and
responsive to a determination that the speed of the variable-speed indoor circulation fan cannot be reduced, signal the damper to move to the open position 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.