Overpressure fans

Overpressure fans in road tunnel escape routes are designed to maintain a safe environment in the event of an emergency such as a fire. The main function of these fans is to create and maintain positive pressure in tunnel escape routes. Here are some reasons why this is important:


During a fire in a tunnel, a lot of smoke can be produced. Smoke can pose a serious threat to the safety of people trying to escape. Pressure ventilators help to keep the smoke in other parts of the tunnel and reduce the amount of smoke in the escape routes. This improves visibility and facilitates safe evacuation.


In addition to smoke, fires in tunnels can produce toxic gases. Maintaining positive pressure in escape routes helps limit the spread of these harmful gases, reducing the risk of exposure to hazardous materials.


Maintaining positive pressure prevents smoke and toxic gases from entering escape routes, thus maintaining the integrity of escape routes. This is critical to ensuring that people can safely evacuate without being exposed to serious hazards.

Emergency Services

Overpressure fans also facilitate access for emergency responders such as firefighters. By controlling smoke and gases, emergency responders can work more effectively and safely when fighting fires and evacuating people.

As part of a comprehensive tunnel safety system, overpressure fans help reduce risk and ensure the safety of people in emergency situations.


Zitron Nederland B.V. is a company that occupies a leading position in the European market as a manufacturer of ventilation systems for railway and road tunnels. Zitron Nederland B.V. can justifiably call itself “Specialists in tunnel ventilation“.