Abstract: The invention relates to a regulating device (15) for at least three flaps (11, 12, 13, 14) of a motor vehicle ventilation, heating or airconditioning system provided with at least one cam plate (16) comprising lever guides (17), wherein another guide (23) is integrated into or on the flap (12).

Abstract: The invention relates to an air-conditioning unit, in particular, a motor vehicle air-conditioning unit, whereby a part of the housing has a different embodiment for air-conditioning units with differing zones and at least the arrangement of a fan, an evaporator and a heater is the same for the different-zoned air-conditioning units. The housing of the air-conditioning unit may have various embodiments for different versions and/or may be varied by add-on or exchangeable components and, for a multi-zoned embodiment of the air-conditioning unit, a bypass for the floor region is provided in a region of the housing, which diverts from the heater, whereby said bypass is embodied in a region which is redundant in an air-conditioning unit with fewer zones.