Heat transfer devices, particularly the radiators for internal-combustion engines of motor vehicles are provided with a fan shroud and a fan arrangement. In this case, the shroud must be adapted to the dimensions of the radiator in such a manner that it can be fastened on the coolant tanks. The fastening of the fan shroud is carried out at least partially on the bent outer edges of the fins of the finned tube block, such that differently dimensioned fan shrouds can be connected to different finned block locations.