Carbon filters and chemical Input, Output and recirculation in ventilation systems that require improve air quality, eliminating polluting gases and odors such as: air conditioning systems (hospitals, laboratories, museums, airports, industrial kitchens, banks, office buildings, etc ... ), industrial processes (Ind. Pharmaceutical, chemical, food, Optics, Microelectronics, etc.), prefiltration of absolute filters. Multicarb Multicarb G. Policarb. Pellet Carbon. Quebraven Galvanized Impregnated carbon.