Air conditioning installations; Air cooling apparatus; Air filtering installations; Air purifying apparatus; Air purifying apparatus and machines; Air sterilisers; Drying apparatus for use in heating, ventilation systems, air conditioning systems and refrigeration systems; Electric air deodorizers; Electronic generator for use in controlling the amount of humidity in the air by creating, removing or circulating small water particles or water vapor in the air; Ionization apparatus for the treatment of air; Ionization apparatus for the treatment of liquids and gases for industrial, commercial or agricultural use