The device has an exhaust air filtration! It is thus suitable for use in areas with security level 2 or higher! The exhaust air filtration corresponds in structure and function to the requirements of the Biological Agents Ordinance and the TRBA 100! The exhaust air filtration takes place including the sterilization of the condensate and the temperature-controlled sterilization of the filter cartridge at each cycle. Until the maximum number of cycles has been reached, the filter cartridge is thus resistant to germination for at least 10 days after each sterilization.