Heating, ventilation, air-conditioning (HVAC) unit for a vehicle

A heating, ventilation and air conditioning unit comprising:

• a case defining a first aperture, a second aperture and a third aperture,
• the first aperture and the second aperture being arranged to receive an exterior airflow, and the third aperture being arranged to receive an interior airflow;
• a first door rotatably attached to the case, the first door being movable between an open position where the first aperture is open and a closed position where the first aperture is closed;
• a second door, separate from the first door, rotatably attached to the case, the second door being movable between an open position where the second aperture is open and a closed position where the second aperture is closed;
• and
• a third door rotatably attached to the case, the third door being movable between an open position where the third aperture is open, a closed position where the third aperture is closed, and a partially-open position where the third aperture is partially open;
• wherein:
• the heating, ventilation and air conditioning unit defines a partial-recirculation air mode when the first door is in the open position, the second door is in the closed position, and the third door is in the partially-open position;
• the heating, ventilation and air conditioning unit defines a recirculation air mode when the first door is in the closed position, the second door is in the closed position, and the third door is in the open position and
• wherein in the open position of the first door and the partially-open position of the third door, the exterior airflow is unable to travel along a first straight line extending from the first aperture to the third aperture.