11 Industrial or commercial air purifiers; air purifiers for research purposes; air purifying units; air purifying machines; air filtering units for removing dust, smoke and allergens from the air; electric fans with evaporative cooling devices; evaporative air coolers; evaporators for chemical processing; adsorption apparatus for generating gas; absorption apparatus for cleaning gas, namely, separator equipment for the absorption of carbon dioxide from dilute gaseous sources; absorption apparatus for extracting chemical compounds from gas, namely, separator equipment for the absorption of carbon dioxide from dilute gaseous sources; air cooling apparatus; electric air dryers; air filtering installations; air purifying apparatus and machines; air preheaters; air sterilizers; anti-splash tap nozzles; bioreactors for use in the treatment of waste; bioreactors for use in the treatment of wastewater; boiler pipes for heating installations; boilers, other than parts of machines, namely, industrial boilers, furnace boilers, heating boilers; chimney blowers; cooling appliances and installations, namely, cooling units for industrial purposes, air cooling apparatus, installations for cooling water, cooling evaporators, glycol cooling apparatus; cooling installations and machines, namely, cooling units for industrial purposes, air cooling apparatus, installations for cooling water, cooling evaporators, glycol cooling apparatus; cooling installations for liquids, namely, cooling units for industrial purposes, installations for cooling water, glycol cooling apparatus; dehumidifiers; degasifiers being installations for removing carbon compounds from liquids; drying apparatus, namely, drying apparatus for chemical processing; drying apparatus and installations, namely, drying apparatus and installations for chemical processing; fans, namely, induced and forced draft fan configurations for commercial and industrial use; filters for air conditioning; filters for water filtering apparatus; membranes for water filtering apparatus; flushing tanks, namely, liquid storage tanks for flushing; gas scrubbers; scrubbers, namely, gas scrubbers, venturi scrubbers; gas scrubbing apparatus; heat exchangers, other than parts of machines; heating apparatus, namely, heating apparatus for liquid or air , or oxygen for industrial use; heating apparatus for solid, liquid or gaseous fuels; heating apparatus, electric, namely, heating apparatus for liquid or air, or oxygen for industrial use; heating elements; heating installations; hot air apparatus, namely, hot air heating apparatus, air heating apparatus for industrial use; humidifiers; membranes for reverse osmosis units; reverse osmosis units; ventilation hoods; water distribution installations, namely, water circulating pumps, fresh or cooling water circulation systems comprised of tubes, pipes, nozzles, valves, filters and regulators, and apparatus for waste water recycling; air cleaning units; cooling evaporator; water cooling towers; heat exchangers for chemical processing; carbon dioxide generators for industrial purposes; air-handling units; fuel processors, namely, fuel refining apparatus for solid, liquid or gaseous fuels; electric machines and apparatus for cleaning air, namely, air cleaning apparatus, air cleaning units, machines in the nature of separators and air exchangers for the cleaning and purifying of air