Air cleaning apparatus; Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air exchangers for cleaning and purifying air; Air humidifiers; Air humidifying apparatus; Air purifiers for automobiles; Air sterilisers; Air sterilising apparatus; Air sterilizers; Air sterilizers for household purposes; Air sterilizing apparatus; Anion generating humidifiers; Electric humidifiers; Germicidal lamps for purifying air; Household air cleaners; Humidifiers; Humid...