Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air filtering installations; Air purifiers; Cleansing/sanitizing system comprising a containment enclosure specially adapted for containing an atomized cleansing/sanitizing spray mechanism for use in the cleansing/sanitizing of objects including articles of manufacture, natural products, foods and pharmaceuticals; Cooking stoves; Electric air deodorizing apparatus; Electric air sanitizing unit; Electric coffee machines; Electric kettles; Electric slow cookers; Energy storage plants; Humidifiers for household purposes; Industrial apparatus using air for drying and cleaning components in the electronics, semiconductor, circuit board, pharmaceutical, medical, and food and beverage industries; Water purification apparatus; Water sterilisers