Accelerated ion devices (for treating the air); Aeration apparatus; Air cleaning apparatus; Air cleaning filters (parts of air cleaning machines or installations); Air cleaning instruments; Air cleaning machines; Air cleansing apparatus; Air conditioning filters; Air filter installations; Air filtering apparatus; Air filtering installations; Air filters for use as dust extractors; Air filtration installations; Air freshening apparatus; Air freshening instruments; Air handling apparatus; Air ionization apparatus; Air processing (purifying) apparatus and machines; Air processing (sterilising) apparatus; Air purification apparatus; Air purification apparatus for clean air cabinets; Air purification installations; Air purification machines; Air purifying apparatus; Air purifying apparatus and machines; Air sterilisers; Air sterilising apparatus; Apparatus for air conditioning; Apparatus for air conditioning for use in vehicles; Apparatus for clarifying air; Apparatus for cleaning air; Apparatus for collecting dust from the air; Apparatus for disinfecting; Apparatus for disinfection; Apparatus for extracting particles; Apparatus for filtering breathing air; Apparatus for filtering dust; Apparatus for purifying air; Apparatus for sterilisation; Apparatus for sterilising; Apparatus for the supply of sterile air; Apparatus for use in deodorising air; Cyclones (air purifying apparatus); Cyclones (air purifying machines); Decontamination apparatus; Devices for absorbing pollutants from the air; Devices for absorbing vapours from the air; Devices for removing pollutants from the air; Disinfectant apparatus; Disinfectant apparatus for medical purposes; Disinfecting apparatus; Disinfection apparatus; Dust removing installations for ventilation; Electrically powered blowers for dust extraction from the air; Electronic air purification apparatus; Electrostatic air cleaning apparatus; Electrostatic air filters; Electrostatic precipitation apparatus for cleaning air; Electrostatic precipitators for cleaning air; Filtering installations for air; Filters for air conditioning; Filters for air extractor hoods; Filters for cleaning air; Filters for dust; Filters for use with apparatus for air conditioning; Household air cleaners; Installations for deodorising the atmosphere; Installations for filtering the atmosphere; Installations for regenerating air in enclosed spaces; Ion generating air purification apparatus (ionisers); Ionisation apparatus for the treatment of air or water; Ionisers for air treatment; Ionising air guns for the treatment of air; Ionising brushes for the treatment of air; Ionising guns for the treatment of air; Ionization apparatus for the treatment of air or water; Ionization instruments for the treatment of air or water; Ionizers for the treatment of air; Mobile air treatment apparatus; Portable filtration apparatus for filtering air (other than machines); Separators for purifying air