Ventilation hoods; Electric fans for personal use; Air purifying apparatus and machines; Air filtering installations; Drying apparatus for use in heating, ventilation systems, air conditioning systems and refrigeration systems; Fans for air-conditioning apparatus; Air-conditioning apparatus; Heating installations; Air conditioning installations; Electrical fans being parts of household air-conditioning installations; Air cooling apparatus; Air-conditioning, air cooling and ventilation apparatus and instruments; Heat pumps; Dehumidifiers; Humidifiers; Air sterilisers; Germicidal lamps for purifying air; Air conditioners for vehicles; Ionisation apparatus for the treatment of air; Ionization apparatus for the treatment of water