The radiator comprises several tubes (3) and corrugated fins (4) forming a soldered network (2) which has end faces for an air inlet and an air outlet (10), and an additional heater having several heating elements (12). The heat conducting connection with the fins and air outlet is carried out on the network by the electrically conductive gratings (15.1-15.3). The heating elements and the ribs are electrically and thermally connected with each other by the conductive contact pieces (17) designed as T-profiles.
