Air-conditioning apparatus and installations; Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air filtering installations; Air filters for domestic use; Air purification units; Plumbing fittings, namely, valves; Portable electric fans; Refrigerating appliances and installations; Refrigerators and freezers for household use and replacement parts and fittings therefor; Water purifying units, for potable water for domestic use