Air filtering installations; refrigerating cabinets; freezers; filters for drinking water; refrigerator apparatus and machines being refrigerators, freezers and cold storages for food refrigeration; ice machines and apparatus; refrigerators; extractor hoods for kitchens; refrigerating display cabinets; ice-cream making machines; refrigerators for household use; refrigerating chambers; humidifiers for household use; ionization apparatus for the treatment of air or water; exhaust hood for kitchen; humidifiers for industrial use; air purifying apparatus and machines; dehumidifier for industrial use; tableware sterilizers; electric water boiler