Supply assembly for feeding air into the passenger compartment of a vehicle

A supply assembly (1) for feeding air into a passenger compartment of a vehicle, the assembly (1) having an electric fan (2) for supplying an air flow; a number of air outlets (5) having respective adjustable on-off members (9) set to a reference position and for adjusting air flow into the passenger compartment; and, for each on-off member, a respective position detecting device (11) for detecting the instantaneous position of the on-off member (9) and supplying a relative positioning signal to a central control unit (12) for adjusting the flow supplied by the electric fan (2) as a function of the signals received from the position detecting devices (11), so as to maintain the air flow into the passenger compartment substantially constant.