A device for treating organic materials having a nozzle base, a roof, a rear wall, and two side walls, delimiting the interior of the device. Extending in the nozzle base are tubes connected to nozzles in the nozzle base, directed toward the interior of the device. The tubes are connected to a process gas apparatus for supplying the tubes with process gas. The process gas apparatus includes a ventilator connected to a pressure chamber for feeding the pressure chamber with process gas. The pressure chamber has at least one outlet connected to at least one of the tubes in the nozzle base to conduct process gas from the pressure chamber into the tubes. The ventilator and the pressure chamber are situated on the roof of the device, in particular in an enclosure. The pressure chamber is connected to the tubes via at least one connecting line in the rear wall.
