Patent ID: 8661844

Claim:
A heating, venting, and air conditioning (HVAC) system for a vehicle, comprising: a blower operable to blow air; an evaporator positioned downstream from the blower and operable to cool air flowing through the evaporator, a heater core positioned downstream from the evaporator and operable to heat air flowing through the heater core; and a single door positioned downstream from the heater core and rotatable to control airflow through the heater core and to direct airflow to at least one of a first outlet and a second outlet; wherein the single door is rotatable to a first position to block airflow from the heater core, block airflow to the second outlet, and allow airflow directly from the evaporator to the first outlet; the single door is rotatable to a second position to allow airflow directly from the evaporator and the heater core and to the first outlet and the second outlet; the single door is rotatable to a third position to block airflow directly from the evaporator, block airflow to the first outlet, and allow airflow directly from the heater core to the second outlet; the single door includes closed sides, closed ends, at least partially open sides, and bosses projecting from the closed sides and centered about a rotational axis of the single door; the closed sides are flat and the closed ends are round; and the single door includes a partition disposed between the closed sides and between the closed ends, the partition defining channels that extend between the at least partially open sides.