variable-frequency local fan

The variable-frequency local fan combines a compact impeller with an integrated variable frequency drive (VFD), allowing stepless adjustment of airflow to suit local ventilation needs.

Active sensors monitor gas concentrations, airflow rates, and temperature, feeding data to the VFD controller. This closed-loop control ensures consistent fresh air delivery while minimizing power draw during low-demand periods.

The fan’s direct-drive motor and sealed bearings guarantee long service life with minimal maintenance. Portable skid or bracket mounts allow rapid repositioning as work zones shift.

By tailoring airflow precisely where needed, the variable-frequency local fan enhances safety and efficiency in confined underground and tunnel applications.