Auxiliary electric heating apparatus, especially for vehicles.

The device has a heat block (6) with electrical heating units e.g. PTC- units, and placed on an air passage housing (2). Electronic control devices (7a-7c) are connected to the heating units via electrical wrap connections, thermally insulated from the block and placed on the housing. An air-tight interface unit in a wall of the housing electrically connects the block with the devices (7a, 7b). The heating units are placed between ribs and are attached to the ribs by conductive paste, where the ribs are provided with gills.