Fan is a device for moving the air. The fan consists of blades (turbine) and the motor. Fans are commonly used for ventilation and to remove the wasted air. Industrial fans are divided by type of application. there are channel fans, axial fans, centrifugal fans, roof fans, explosion-proof fans, fans for aggressive environment, fans for smoke, heat-resistant fans, etc.
To regulate the fan speed there should be used a specialized automation (thyristor, triac regulators and transformer turns). Industrial fans are made by both foreign and russian companies. The most common are Ostberg, Systemair, Polar Bear, Vortice, NEPTO, Arktos, O.Erre, Moven etc.