11 Apparatus for cooking, refrigerating and drying, namely, gas and oil powered industrial steam cookers, refrigerators and steam driers for batch and continuous cooking and drying of animal by-products, fish, grain, malt from distilleries, insects, industrial sludge, fish, blood, feathers, distiller's dried grains with solubles (DDGS), biomass, wood, wood chips, salt, silicon, gypsum, and orange peel; industrial boilers; apparatus for steam generating, namely, steam boilers; apparatus and installations for cooking, namely, gas and oil powered industrial steam cookers; electric autoclaves for cooking; apparatus for sterilizing and for sanitary purposes, namely, evaporative air coolers, regenerative thermal oxidizers used to destroy airborne volatile organic compounds, odors, and other air pollutants from industrial operations, parts for the aforesaid goods; cooling machines and apparatus, namely, evaporative air and meal coolers; refrigerators, cooling installations, namely, evaporative air and meal cooling installations, parts for all the aforesaid goods; ice freezing installations and parts therefor; industrial freezers and parts therefor; heating apparatus and equipment, namely, industrial steam heaters for animal by-products, fish, grain, malt from distilleries, insects, industrial sludge, fish, blood, feathers, distiller's dried grains with solubles ( DDGS), biomass, wood, wood chips, salt, silicon, gypsum, and orange peel; drying installations and drying machines, namely, installations and machines for drying biomass and biosolids from waste water treatment plants, parts therefor; industrial steam boilers; economizers, namely, feed-water heaters, parts and accessories therefor; evaporation apparatus and installations, namely, evaporators for chemical processing and structural parts therefor; apparatus and installations in the nature of coagulators, namely, heat exchangers for boiling proteins in fish and other raw materials based on animals, parts for the aforesaid goods; sterilizers and sterilizing equipment, namely, chemical or thermal sterilization units, parts therefor; heat exchangers other than parts of machines, parts therefor; industrial electric, gas, and oil-powered stoves, parts therefor; scrubbers, namely, air cleaning apparatus in the nature of air washers