A system is provided for the diffuse ventilation of a vehicle interior in a dashboard area which, for avoiding manufacturing problems and for the purpose of an advantageous mounting, has an insert which is composed of a top and bottom part and which is inserted into the dashboard flush with its top side. In the bottom part, a plurality of separate channels are formed which extend in parallel to one another, are open toward the top, extend in the longitudinal direction of the insert and are covered directly by the top part.