Heating, ventilating, and air conditioning and purification equipment (ambient); air treatment equipment; flues and installations for conveying exhaust gases; air filters for industrial installations; water filters for industrial use; industrial treatment installations; regulating and safety accessories for water and gas installations; fume destructing hoods; extractor fans and fans for gas extractors; fans for fume extractors; ventilating fans; ventilating fans; gas cleaners and purifiers; flue gas cleaning apparatus; gas cleaners and purifiers; filters for cleaning gases [parts of industrial installations]; hoods incorporating extractor fans; filters for air extractor hoods; fume destructing hoods; air handlers; air handling installations; accelerated ion devices [for treating the air]; ionization apparatus for the treatment of air or water; ionisation apparatus for the treatment of air or water; installations and equipment for the treatment of exhaust flue gas; wet scrubbers; separators for scrubbing gas; electrostatic precipitators for cleaning gases; gas scrubbers [parts of gas installations]; air purifiers; industrial air purifiers; air sterilizers; air filtering installations; filters for air purifiers; exhaust flue gas treatment systems, namely, gas scrubbers [parts of gas installations].