Abstract: The inventive paint dryer, comprises a cabin (12) for housing objects (15) that are to be painted and dried. At least one fresh air supply (8) is provided in order to introduce fresh air into an air circulation system pertaining to the dryer (1) resulting in the circulation of said air. At least one pure gas supply line (7) is provided, wherein thermally cleaned and heated waste air is introduced as a pure gas, thereby maintaining the waste gas circulated in the circulation system at the desired temperature in such a way that objects (15) arranged in the cabin (12) can be dried by radiation and/or convection. The pure gas supply line (7) is surrounded by the fresh air supply line (8) at least along a longitudinal pipe segment and at least in said longitudinal pipe section the pure gas supply pipe (7) is constructed in such a way as to allow for the transmission of heat to fresh air flowing into the fresh air supply (8).