11 Flues and installations for conveying exhaust gases, namely, ventilating exhaust fans; 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; Gas burners, heating boilers and water heaters; Lighting, namely, lighting installations and lighting reflectors; Cooking, heating, cooling and preservation equipment, for food and beverages, namely, vapour and gas extractor hoods for cookers; Filters for industrial and household use, namely, air filters, air filtering installations, filters for air purifiers; Filters for cleaning gases being parts of household or industrial installations; Filters for gases being household or industrial installations; Filters for waste gas purification; Industrial air filter machines; Filters for use with apparatus for ventilating for household, commercial or industrial use; Water filters; Filters for use with apparatus for water supply; Filters for water purifiers; Electric water purification filters for household 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; Gas scrubbing apparatus and gas purification apparatus, namely, gas purification machines; Chemical processing equipment, namely, chemical installations for conditioning and treating drinking water, wastewater, process water, air and gaseous mixtures; Water, air, and gas treatment equipment, namely, chemical dosing machines, chemical mixing machines; Irradiation equipment for treating liquids and gases, namely, ultraviolet lamps not for medical purposes; Regulating and safety accessories for water and gas installations, namely, water regulating apparatus being water flow control valves and gates, gas regulators, pressure regulators, regulating accessories for gas pipes and lines; 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