11 Air-conditioning installations; Air-conditioning, air cooling and ventilation apparatus and instruments; Germicidal lamps for purifying air; Ionization apparatus for the treatment of air; Lamp shades; Lampshade holders; LED (light emitting diode) lighting fixtures; Light bulbs; Lighting apparatus, namely, lighting installations; Luminous tubes for lighting; Radiators, electric; Regulating accessories for water supply, namely, metered valves; Sterilizers; Ultraviolet ray lamps, not for medical purposes; Water heaters; Water purification installations; Water purifying apparatus and machines; Water softening apparatus and installations; Water sterilizers