11 Air purifiers; Filters for air purifiers; Water treatment filters; Air handlers; Filters for drinking water; Air cleaning apparatus, namely, air cleaning units; Installations for deodorising the atmosphere, namely, electric air deodorizers; Aeolian ventilators, namely, turbine ventilators; Wastewater purification units; Gas scrubbing apparatus and gas purification apparatus, namely, gas purification machines; Heat exchangers, other than parts of machines; Heating installations; Industrial ventilation apparatus, namely, ventilating fans for industrial purposes; Ventilation installations for kitchens, namely, ventilation units for commercial food preparation and food serving; Disinfectant apparatus for disinfecting water, air or other gaseous media; Germicidal lamps for purifying air; Ambient heating, ventilating, and air conditioning and purification equipment, namely, ambient air treatment, air conditioning and air purifying equipment for industrial, commercial or municipal use; Sanitary installations, water supply and sanitation equipment, namely, sanitary installations and sanitation equipment in the form of water purification, desalination and water conditioning installations for industrial, commercial or municipal use, and sterilization, disinfection and decontamination equipment for water, air or other gaseous media, for industrial, commercial or municipal use; Flues and installations for conveying exhaust gases, namely, ventilating exhaust fans; Regulating and safety accessories for water and gas installations, namely, water regulating apparatus, gas regulators, pressure regulators, regulating accessories for gas pipes and lines; Gas burners, heating boilers and water heaters; Lighting, namely, lighting installations and lighting reflectors; Filters for industrial use, namely, air filters, air filtering installations, filters for air purifiers; Filters for cleaning gases being parts of industrial installations; Filters for waste gas purification; Industrial air filter machines; Filters for use with apparatus for ventilating for commercial or industrial use; Water filters; Filters for use with apparatus for water supply; Filters for water purifiers; Electric water purification filters for commercial or industrial purposes; Water treatment filters; Filters for use with apparatus for sanitary purposes, namely, filters for the conditioning and decontamination of water, air and other gaseous media; Chemical processing equipment, namely, chemical installations for conditioning and treating drinking water, wastewater, process water, air and gaseous mixtures, and gas chromatography apparatus for industrial, commercial or municipal use; Cooking, heating, cooling and preservation equipment, for food and beverages, namely, vapour and gas extractor hoods for cookers; all the aforesaid goods for use in the industrial, commercial or municipal treatment of water, air or other gaseous media