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 conditioners; Air conditioning apparatus for commercial buildings; Air conditioning apparatus for commercial use; Air conditioning apparatus for industrial use; Air conditioning apparatus for office use; Air conditioning apparatus for public buildings; Air conditioning apparatus for residences; Air conditioning apparatus for residential use; Air conditioning apparatus for use in clean rooms; Air conditioning apparatus for use in operating theatres; Air conditioning filters; Air conditioning for data processing rooms; Air conditioning installations; Air conditioning installations for commercial use; Air conditioning installations for industrial use; Air conditioning installations for residential use; Air delivery apparatus for cooling buildings; Air delivery apparatus for heating buildings; Air delivery apparatus for use in industrial processes; Air delivery apparatus for ventilating buildings; Air distribution installations; Air distribution units; 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 handling installations; Air ionization apparatus; Air processing (conditioning) apparatus; Air processing (cooling) 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 recirculating apparatus; Air recirculating installations; Air separation apparatus; Air sterilisers; Air sterilising apparatus; Air sterilizers; Air washing apparatus; Apparatus for air conditioning; Apparatus for clarifying air; Apparatus for cleaning air; Apparatus for collecting dust from the air; Apparatus for filtering breathing air; Apparatus for purifying air; Apparatus for the distribution of air; Apparatus for the supply of sterile air; Apparatus for use in deodorising air; Central type air conditioning apparatus; Cold air blowing apparatus; Combined heating and air conditioning apparatus; Devices for absorbing vapours from the air; Devices for removing pollutants from the air; Devices for removing vapours from the air; Domestic air conditioning apparatus; Domestic air conditioning installations; Electric air conditioners; Electronic air purification apparatus; Electrostatic air cleaning apparatus; Electrostatic air filters; Electrostatic precipitation apparatus for cleaning air; Electrostatic precipitators for cleaning air; Extractors (ventilation or air conditioning); Filtering installations for air; Filters for air conditioning; Filters for air extractor hoods; Filters for cleaning air; Filters for use with apparatus for air conditioning; Installations for aerating air in enclosed spaces; Installations for air conditioning; Installations for air extraction; Installations for airing; Installations for conditioning air; 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; Ionization apparatus for the treatment of air or water; Ionization instruments for the treatment of air or water; Ionizers for the treatment of air; Power filters for air-conditioning; Ventilation (air conditioning) installations for buildings; Ventilation (air conditioning) installations for laboratories; Ventilation (air-conditioning) installations and apparatus