Major national and international safety regulations* are very clear regarding the installation of ventilation systems in tunnels that exceed a length of 1,000 metres.

In the case of shorter tunnels, safety will depend on the proper verification of the requirements in each specific case. This requires in-depth studies based on the particular data of each tunnel, such as the diameter, perimeter, slope, traffic volume expected…

To meet these needs, Zitrón, always at the forefront, has developed its Jet Fan range; latest generation electric fans:

• JZie—JZ Rie
• JZe —JZ Re

Thanks to their three-dimensional suspension system, they can be adapted to all diameters and installation modes.

Equipped with a bypass that enables the direct automatic start-up of the machine during emergency work, in addition to a frequency-variation speed control system.