Underground auxiliary fans—also termed booster fans—are positioned downstream of primary ventilation to enhance pressure and airflow to remote workings and development drifts.
Axial or small centrifugal models deliver 3,000 to 40,000 CFM at pressures up to 3 kPa. Portable skids and quick-flange connections enable rapid redeployment alongside advancing tunneling or mining fronts.
Equipped with IE3 motors and optional VFD controls, these fans implement on-demand ventilation, ramping up when diesel machinery or blasting increases gas levels, then throttling back to conserve energy.
Robust housings, sealed bearings, and vibration monitoring ensure reliability in dusty, humid underground conditions, maintaining continuous, safe ventilation throughout operations.