Air distribution module for an air conditioning system of a passenger compartment

The device has a case (1) with two air inlets (2, 3) to be respectively supplied by mixed air flow and cold air flow from an air treatment module. An air flow control (8) is installed between a defrost outlet (4) and an aeration outlet (5). An air flow control (9) is installed at immediate vicinity of the inlet (2) in order to control access to an air flow mixed at a mixing chamber (7) and at a base outlet (6). An independent claim is also included for an air-conditioning, heating and ventilation installation.