Metro and railroad stations

Railroad stations are still the most important traffic nodes in some towns and cities. Numerous human beings move daily in them and make them attractive locations.

The air conditioning of these highly frequented and centrally situated building complexes poses very special challenges to building services engineering. The central location and the high level of diversity in the usage with restaurants, takeaways, sales areas, hotels, smoking zones, supply and disposal or hospitals bring corresponding pollutant sources and, in general, poor quality of air with them. The demands for good air quality are comparable with the challenges for airports, restaurants or even hospitals.

ionair AQS helps in the optimal design of the ventilation concept and ensures high efficiency in operation and a high level of quality for the competing forms of usage.

Ionization systems


Air volume


Number of properties

Metro and railroad stations

ionair inactivates virus over 99%

The Air Quality System (AQS) of ionair in the supply air frees the indoor air from airborne surrogate viruses (non-pathogenic covered Phi6 bacteriophages with structure, particle size and environmental stability equivalent to that of SARS-CoV-2). This has been certified by the Fraunhofer Institute for Building Physics IBP. This is very positive news for the Swiss Company and our international customers.