HEATING, VENTILATION AND/OR AIR-CONDITIONING DEVICE

The invention relates to a heating, ventilation and/or air-conditioning device () for a motor vehicle, which device comprises a housing (), a cold air region (), a hot air region (), an evaporator () which is configured to provide a cold air stream () in the cold air region (), and a heating element () which is configured to provide a hot air stream () in the hot air region (). Furthermore, the device () has a one-piece cross-flow deflection device (), which is covered by the housing () and comprises a mixing device () and a cover (), wherein the mixing device () has a plurality of mixing chambers (), each of which is provided for mixing a part of the cold air stream () and a part of the hot air stream (). The cover () here separates the cold air region () and the hot air region () from each other at least in portions. Furthermore, the cover () has a fixing device () which is provided for fixing the heating element ().