Device for changing the temperature of a medium

A device for altering the temperature of a medium, especially an automobile, containing a flat heating current carrying element (1) whose temperature alters with the current, an element (2), and an element (3), which contacts element (1) with electric charge transfer between the elements, and element (1) contacts elements (2) and (3) with thermal energy transfer, where elements (2) or (3) are not parallel to the surface expansion direction.