Air purifying apparatus and machines; Air filtering installations; Gas purification machines; Germicidal lamps for purifying air; Ionization apparatus for the treatment of liquids and gases for industrial, commercial or agricultural use; Electric air deodorizers; Air conditioning installations; Disinfectant apparatus for medical purposes; Dish disinfectant apparatus for industrial purposes; Filters for air conditioning; Air-conditioning, air cooling and ventilation apparatus and instruments; Gas scrubbing apparatus; Air conditioning apparatus; Ventilation hoods