一种通风装置，具有由第一材料成分和由第二材料制成部件的单向挡板元件（14），其中，所述第一材料元件比所述第二材料组分更硬的框架（12）。 止回翼片元件（14）包括被布置为使得其搁置专门的单向挡板元件（14）或排气装置（10）的车辆部分（28）附接到在可移动的止回翼片（18），所述排气装置的一部分（10 ）作用在车辆部件（28）上，是止回挡板元件（14）的一部分。

A ventilation device has a frame (12) from a first material component and a non-return flap element (14) made of a second material component, wherein the first material component being harder than the second material component. The non-return flap element (14) includes a movable non-return flap (18) which is arranged such that it rests exclusively on the non-return flap element (14) or the venting device (10) to a vehicle part (28) attachable to, said part of the venting device (10 ) which engages the vehicle part (28), part of the non-return flap element (14).