Air processing (purifying) apparatus and machines; Air purifying apparatus; Air purifying apparatus and machines; Apparatus for purifying air; Cyclones (air purifying apparatus); Germicidal lamps for purifying air; Separators for purifying air; Cyclones (air purifying machines); Air impellers for ventilation; Air inductor apparatus (ventilation); Apparatus for exhausting dust (ventilation); Air delivery apparatus for ventilating buildings; Aeolian ventilators; Apparatus for exhausting fumes (ventilation); Apparatus for exhausting gases (ventilation); Apparatus for exhausting mists (ventilation); Apparatus for exhausting particles (ventilation); Apparatus for extracting dust (ventilation); Apparatus for extracting fumes (ventilation); Apparatus for extracting gases (ventilation); Apparatus for extracting mists (ventilation); Apparatus for extracting particles (ventilation); Apparatus for ventilating; Apparatus for ventilating vehicles; Dampers for ventilating installations; Dust extraction installations (ventilation); Dust removing installations for ventilation; Electrically powered air blowers for ventilation purposes; Electrical installations for ventilating; Electrical appliances for ventilating; Electrically powered blowers for ventilation; Electro ventilators; Extractor units (ventilation); Extractors (ventilation or air conditioning); Filters for exhaust extractors (parts of ventilation installations); Filters for use with apparatus for ventilating; Fire ventilators for exhausting fumes; Process ventilation apparatus; Ventilating apparatus; Ventilating hoods for steam; Ventilating installations; Ventilating units; Ventilation (air conditioning) installations for buildings; Ventilation (air conditioning) installations for laboratories; Ventilation (air-conditioning) installations and apparatus; Ventilation (air-conditioning) installations for vehicles; Ventilation apparatus; Ventilation apparatus for vehicles; Electric fans for ventilation; Electrical fans being parts of household ventilation installations; Electrically powered fans for ventilation purposes; Fans for the ventilation of food vending kiosks; Fans for ventilating; Propellers (fans) for ventilation apparatus; Ventilating fans; Ventilation grilles being parts of extractor fans; Air conditioning fans; Air-conditioning fans; Axial fans; Electric ceiling fans; Extractor fans; Fan heaters; Fans for air conditioning installations; Fans for use in air conditioning; Air heat recovery apparatus; Air heat recovery installations; Apparatus for waste heat recovery; Heat recovery apparatus (other than parts of machines); Heat recovery devices (other than parts of machines); Installations for use in the recovery of waste heat; Machines for the recovery of heat