Ventilation System for a vehicle

The road vehicle interior ventilating channel arrangement (1) has first (2) and second (3) flattened rectangular-section channels crossing (4) each other. There is a rectangular air outlet grille (5) with slats (6) at the place where the two air channels cross each other. A flap valve at the crossing point may direct air out through the grille or into a waste channel and may be regulated by a PTC electrical element.