Air analysis apparatus; air measuring apparatus; air pollution measuring devices; air temperature sensors.

Ventilation [air-conditioning] installations and apparatus; ventilation apparatus; mobile ventilating apparatus; ventilating units; air conditioning apparatus; air cooling apparatus; cooling appliances and installations; air purifying apparatus and machines; air purifiers; air cleaning apparatus; air sterilisers; ionization apparatus for the treatment of air; air freshening apparatus; air humidifying apparatus; air filtering installations; air filters; filters for air purifiers; filters for air conditioning.