Air filter installations; air filtering apparatus; air filtering installations; air filters for use as dust extractors; electrostatic air filters; air cleaning apparatus; air cleaning filters (parts of air cleaning machines or installations); air cleaning instruments; electrostatic air cleaning apparatus; air processing (purifying) apparatus and machines; air purification apparatus; air purification installations; electronic air purification apparatus; ion generating air purification apparatus (ionisers); devices for absorbing pollutants from the air; devices for removing pollutants from the air; air conditioning filters; bag filters; dust filters; filters being parts of industrial apparatus; filters for air conditioning; filters for air extractor hoods; filters for cleaning air; filters for cleaning gases (parts of household or industrial installations); filters for dust; filters for exhaust extractors (parts of household or industrial installations); filters for fume extractors; filters for gas extractors; filters for industrial installations; filters for use with apparatus for air conditioning; filters for use with apparatus for ventilating; filters for waste gas purification; portable filtration apparatus for filtering air (other than machines); ventilation apparatus; ventilation terminals; vehicle ventilation products, including vehicle vents; parts, fittings and accessories for all of the aforementioned goods