The ventilating air current is drawn around a mine through pressure created by a fan. Fans include:
Main fans, which are located on the surface, create the ventilating pressure that generates the ventilation circuit around the mine.
Booster fans, which are located underground and reduce the pressure that must be generated by the main fans
Auxiliary fans which generate an air flow beyond the circuit created by the main and booster fans
Scrubber fans, which remove dust by passing air through a filter