9
Noise filters; Optical filters; Magnetic filters; Electrostatic precipitators; Electrical filters; Polarization filters; Radio-frequency filters; Respiratory mask filters [non-medical]; Air temperature sensors; Air quality sensors
11
Pollen filtering apparatus; Dust filters; Air filters; Water filters; Filters for air conditioning; Filters for use in aquariums; Filters for drinking water; Filters for industrial installations; Filters for gas extractors; Filters for use with apparatus for ventilating; Faucet filters [plumbing fittings]; Filters for use with lighting apparatus; Filters for use with apparatus heating; Filters for water purifiers; Air filters for air conditioning units; Strainers for water lines; Filters for wastewater; Filters for refrigeration systems; Filters for air purifiers; Water treatment filters; Filters for cleaning air; Filters for air conditioning; Filters for water purifiers; Filters for industrial and household use; Air filters for industrial installations; Air filters for household use; Filters for use with apparatus for water supply; Filters for use with apparatus for water supply; Filters for air extractor hoods; Electrostatic filters for water filtration; Power filters for water purification [other than machines]; Filters for use with apparatus for steam generating; Filters for cleaning gases [parts of household or industrial installations]; Air treatment equipment; Ionization apparatus for the treatment of air or water; Ionization apparatus for the treatment of air or water; Ionization apparatus for the treatment of air; Ionization apparatus for the treatment of air or water; Air purifiers; Air dryers; Humidifiers; Air reheaters; Air sterilizers; Air-conditioning apparatus; Air sterilizers; Dehumidifiers; Air balancing dampers; Air cleaning apparatus; Air cleaning apparatus; Air purifying apparatus; Air humidifying installations; Air handling installations; Air deodorizing apparatus; Air circulation apparatus; Supply air diffusers; Installations for the cooling of air; Air impellers for ventilation; Air curtains for ventilation; all the aforesaid goods, excluding the following goods: Hair dryers, Apparatus and appliances for drying and styling the hair, Parts and fittings for the aforesaid goods, Air compressors or Compressed-air dryers, Heat recovery apparatus
40
Air treatment; Air regeneration; Air purification; Air deodorizing; Air freshening; Recycling of insulating gases from air conditioning plant; Rental of water and air purification equipment; Rental of air purification apparatus; Rental of air-conditioning apparatus; Rental of water filters
42
Testing of filters; Analysing of air in building environments; Air flow measurement services; Air flow biochemical analysis services; Air flow particle counting services; Air quality data collection services