Motor vehicle air conditioning

The apparatus (1) has a housing (13) provided with a radial flow compressor (12) comprising an axial inlet opening and a tangential outflow opening. The radial flow compressor includes a fan housing provided with wheels comprising shovels rotating around an axis of rotation. A refrigerant vaporizer (18) supplies air for cooling an inner space of a motor car, and a heating device (2) supplies air to heat the inner space of the motor car. A flow interfering body is formed in an inner side of the fan housing.