Distributor valve with air deflector vanes for a heating and ventilating system of a motor vehicle

A distributor box (4) for a heating and ventilating apparatus for a passenger compartment of a motor vehicle, comprises an air inlet (20) for admitting a heated airflow and/or a cold airflow into the distributor box therethrough, a plurality of air outlets (22,24,26,28) for leading the airflow to different zones of the passenger compartment, and at least one distributor valve (30) pivotally mounted within the distributor box for pivoting movement between a plurality of positions whereby to distribute said airflow between the plurality of outlets. The distributor valve is provided with vane members (50) on at least one face surface thereof for guiding the airflow from the air inlet (18i) toward at least one of the air outlets. The vane member is integrally formed on the distributor valve.