Tunnel ventilation systems are among the most important systems in a tunnel. On the one hand, it ensures fresh air in the tunnel and, in the event of a fire, is also the system that can save human lives. In the first case, it checks and regulates the air in such a way that exhaust gas values in the tunnel tube remain at a level that is harmless to humans. It is not only the classic toxins such as CO2 or NOX values that count, but also the clouding of vision (which is caused by rain, for example), which are decisive for a safe journey.
In the event of a fire, seconds make the difference between life and death. If a vehicle should catch fire inside the tunnel, the tunnel ventilation system ensures that, on the one hand, the toxic smoke is extracted on the spot, and on the other hand, enough oxygen can reach the people through the controllable air flow. This enables those who have been involved in an accident to escape with as few obstacles as possible.