Exhaust fan unit of a heating, ventilation, and/or air conditioning (HVAC) system

An exhaust fan unit of a heating, ventilation, and/or air conditioning (HVAC) system, the exhaust fan unit comprising:

• an outer fluid path of a nozzle assembly of the exhaust fan unit defined by and between an outer wall of the nozzle assembly and an inner wall of the nozzle assembly;
• an inner fluid path of the nozzle assembly defined by and inward from the inner wall;
• a floor extending across the inner fluid path and configured to collect liquids within the inner fluid path;
• and
• at least one entrainment port extending from the outer wall to the inner wall and configured to enable environmental air to pass to the inner fluid path, wherein each entrainment port of the at least one entrainment port comprises a bottom edge that is axially aligned with the floor adjacent to the inner wall and relative to an axis of the nozzle assembly, such that the bottom edge is configured to drain the liquids from the inner fluid path.

An exhaust fan unit of a heating, ventilation, and/or air conditioning (HVAC) system, the exhaust fan unit comprising:

• an outer fluid path of a nozzle assembly of the exhaust fan unit defined by and between an outer wall of the nozzle assembly and an inner wall of the nozzle assembly;
• an inner fluid path defined by and inward from the inner wall;
• and
• a dual-tapered, leaf-shaped entrainment port extending from the outer wall to the inner wall and configured to enable environmental air to pass to the inner fluid path, wherein the dual-tapered, leaf-shaped entrainment port comprises:
• a first curved surface;
• a second curved surface;
• and
• a bottom edge coupling the first curved surface with the second curved surface, wherein each bottom edge is configured to receive and drain liquids from the inner fluid path to an external environment.