Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes; refrigerated water dispensers; water filtration bottles; shower systems; bathroom heater and extractor units; refrigerators; barbecues; burners; brackets for gas burners; gas burners; cookers; cooking apparatus and installations; cooling appliances, installations and machines; cooling installations for water; distillation apparatus; filters for drinking water; freezers; gas barbecues; grills; griddles; heating plates; ice machines and apparatus; refrigerating chambers, cabinets and containers; sterilisers; wok cooking apparatus; water purification installations, apparatus and machines; water softening apparatus and installations; water sterilisers