Tunnel ventilaton systems are essential to infrastructures, including tunnels, to limit nose and ensure a safe exit in case of fire.CleanAir Technology produces advanced technology solutons in tunnel and mine ventilaton systems. The fan quality and the ventilaton system in tunnels directly affect human health and work efficency. CleanAir Technology axal fans with frequency converters meet your ventilaton needs best wth the high pressure and low energy consumption they provde. We ensure a complete check of the compatiblity of the fan wth post- production performance measurements.