7
Aerators; Venturi scrubbers
11
Electrostatic air filters; Air filters; Air purifying apparatus; Filters for use with apparatus for ventilating; Air filtering installations; Filters for air purifiers; Air cleaning filters [parts of air cleaning machines or installations]; Filters for cleaning air; Electrostatic precipitators for cleaning air; Solar lamps; UV halogen metal vapour lamps; Fluorescent lamps with low ultra-violet light output; Flues and installations for conveying exhaust gases; Air-conditioning installations; Air cleaning apparatus; Gas cleaners and purifiers; Installations for airing; Aeration apparatus; Electrically powered air blowers for ventilation purposes; Electric air purifiers; Electrically powered blowers for dust extraction from the air; Electric fans for personal use; Electrically powered fans for ventilation purposes; Electrical fans being parts of household ventilation installations; Electric fans [for household purposes]; Filters for gases [household or industrial installations]; Filters for industrial and household use; Dust filters; Industrial air filter machines; Industrial air purifiers; HVAC systems (heating, ventilation and air conditioning); Heating, ventilating, and air conditioning and purification equipment (ambient); Accelerated ion devices [for treating the air]; Ionising brushes for the treatment of air; Ionising guns for the treatment of air; Ionization apparatus for the treatment of air or water; Ion exchange installations; Ionisation chambers; Ionization apparatus for the treatment of air; Filters for air conditioning; Air treatment equipment; Air handlers; Air filters for household use; Air filters for industrial installations; Air purifiers; Air purifying apparatus and machines; Germicidal lamps for purifying air; Air sterilizers; Air sterilizers for household purposes; Air sterilising apparatus; Airstream generating apparatus; Ventilating installations; Apparatus and installations for ventilating; Mobile ventilating apparatus
40
Air purification; Air regeneration; Air treatment; Air and water conditioning and purification; Air deodorizing