Accelerated ion devices for treating the air; air circulation apparatus; air cleaning apparatus; air cleaning filters [parts of air cleaning machines or installations]; air cleaning instruments; air cleaning machines; air cleansing apparatus; air dehumidifiers; air deodorising apparatus; air filtering apparatus; air filtering installations; air filters for air conditioning units; air filters for household use; air filters for industrial installations; air ionization apparatus; air processing [purifying] apparatus and machines; air processing [sterilising] apparatus; air purification installations; air purifiers for household use; air purifying apparatus and machines; air purifying units for commercial use; air sterilisers; air sterilising apparatus; apparatus for filtering breathing air; apparatus for filtering dust; catalytic oxidizers for industrial air pollution control; compressed air ventilators; cyclones [air purifying apparatus]; cyclones [air purifying machines]; devices for removing pollutants from the air; devices for removing vapours from the air; electronic air purification apparatus; electrostatic air cleaning apparatus; electrostatic air filters; electrostatic precipitators for cleaning air; filters for air extractor hoods; filters for air purifiers; filters for cleaning air; filters for gases [parts of household or industrial installations]; filters for use with apparatus for air-conditioning; germicidal lamps for purifying air; household air cleaners; industrial air filter machines; industrial air purifiers; installations for filtering the atmosphere; ion generating air purification apparatus; ionisation apparatus for the treatment of air; ionisers for air treatment; ionising brushes for the treatment of air; separators for purifying air; separators for scrubbing air; wearable air purifiers; ultraviolet sterilizers; filtering installations (household or industrial)