Abstract: A heating, ventilation, and/or air conditioning (HVAC) unit may include a supply fan section having a supply fan disposed therein to force a supply air flow through a discharge plenum of the HVAC unit. The HVAC unit may also include an economizer positioned adjacent the supply fan section to receive an outdoor air flow and direct the outdoor air flow into the supply fan section.

Abstract: A fan shroud for a heating, ventilation, and/or air conditioning (HVAC) unit may include an outer wall to couple to a housing of the HVAC unit and an inner wall disposed within the outer wall. Additionally, the inner wall may be air permeable. The fan shroud may also include an acoustic damping material disposed between the outer wall and the inner wall. The fan shroud may encircle a fan of the HVAC unit to reduce noise.

Abstract: The present disclosure relates to an energy recovery wheel for a heating, ventilation, and/or air conditioning (HVAC) system. The energy recovery wheel includes a frame positioned within a passage of the HVAC system. The frame is configured to rotate about an axis of the passage relative to the HVAC system and includes an opening that is configured to transmit an air flow. The energy recovery wheel also includes a heat transfer element coupled to the frame and positioned within the opening, where the heat transfer element is permeable and configured to transition between a closed orientation to occlude the opening and direct the air flow across the heat transfer element and an open orientation to substantially unblock the opening and mitigate interaction between the air flow and the heat transfer element.

Abstract: The present disclosure relates to a centering system for a heating, ventilation, and/or air conditioning (HVAC) unit to be mounted to a curb. The centering system includes a centering wedge configured to couple to a base rail of the HVAC unit, the base rail having a lateral surface and a base surface along a length of the HVAC unit. The centering wedge includes an angled surface configured to extend between the lateral surface of the base rail and the base surface of the base rail. The angled surface is configured to contact the curb during installation of the HVAC unit to guide the HVAC unit toward a centered position on the curb.

Abstract: The present disclosure relates to a liquid drainage system for a heating, ventilation, and/or air conditioning (HVAC) system, where the liquid drainage system includes a drain pan configured to collect and drain condensate within a housing. The drain pan is configured to be mounted within the housing separate from an evaporator assembly and is removable from the housing independent of the evaporator assembly. The liquid drainage system also includes a drain pan extension plate configured to collect and drain condensate to the drain pan, where the drain pan extension plate is configured be removably mounted within the housing. The drain pan extension plate and the drain pan are configured to overlap with one another, in an assembled configuration, along a direction of airflow across the evaporator assembly.

Abstract: The present disclosure relates to an HVAC system door assembly that includes a door that includes a panel having a first side and a second side opposite the first side, and a first seal circuit. The first seal circuit is disposed on the first side. The HVAC system door assembly also includes a door frame that includes a second seal circuit. HVAC system door assembly further includes a ridge projecting from one of the first seal circuit or the second seal circuit configured to align with and engage a central portion of the other of the first seal circuit or the second seal circuit when the door is in a closed position with respect to the door frame. The ridge includes a cross-sectional profile having a flattened peak section with sloping side sections that extend from boundaries of the flattened peak section to a base of the ridge.