industrial dehumidifier; industrial dryers for heating and dehumidifying; dehumidifiers for commercial use; air conditioning apparatus and installations; air conditioning installations; air filtering installations; air filters for industrial installations; clean room installations; gas scrubbing installations; heat exchangers for chemical processing; heat exchangers not being parts of machines; air purifier; gas filtration devices, namely, filters and filtering devices for gas conditioning; volatile organic compound concentrators, namely, recuperative thermal oxidizers for industrial air pollution control of volatile organic compounds, catalytic oxidizers for industrial air pollution control of volatile organic compounds; gas recycling system comprised of a honeycomb matrix rotor for the recovery, purification and return of gases in industrial applications; components for gas filtration elements, namely, air filters for industrial installations; filtration elements for adsorbing or absorbing volatile organic compounds, namely, air filters for industrial installations; gas filtration devices having volatile organic compound adsorbing or absorbing rotors, namely, filters and filtering devices for gas conditioning; installations for air-conditioning purposes; installations for drying, ventilating, and dehumidifying purposes, namely, drying apparatus for use in heating, ventilation systems, air conditioning systems and refrigeration systems, drying apparatus for chemical processing, dehumidifiers, ventilating fans for commercial and industrial use; installations for removing impurities from gases, namely, filters and filtering devices for gas conditioning; heat exchangers, namely, other than parts of machines; rotary regenerative heat exchangers, namely, other than parts of machines; installations for treating gases, namely, filters and filtering devices for gas conditioning; rotary heat exchangers, namely, other than parts of machines; heat exchanger rotors specially adapted for industrial dryers for heating and dehumidifying, heat exchanger rotors, namely, structural parts for heat exchangers for chemical processing; ceramic heat exchangers, namely, other than parts of machines; aluminum heat exchangers, namely, other than parts of machines; cassettes for heat exchangers, namely, for heat exchangers other than parts of machines; cassettes for concentrators for volatile organic compounds, namely, structural parts of air filtering installations; rotors, namely, replacement parts of air filtering installations, replacement parts of dehumidifiers; honeycomb matrix rotors, namely, structural parts of air filtering installations, structural parts of dehumidifiers; replacement, structural parts and replacement, structural fittings for all the aforesaid goods