main ventilation fan

Main ventilation fans serve as the primary drivers of airflow in HVAC systems and industrial facilities. By moving large volumes of air through supply and return ducts, they maintain temperature, humidity, and air quality within defined comfort or process parameters.

Available in axial and centrifugal configurations, these fans are optimized for high flow rates—up to 200,000 CFM—and moderate static pressures. Robust housings and dynamically balanced impellers minimize vibration and noise.

Equipped with IE4 premium-efficiency motors and compatible with variable frequency drives (VFDs), main ventilation fans implement demand-controlled ventilation, adjusting speed based on occupancy, temperature, or air-quality sensor inputs, resulting in energy savings of up to 40% compared to constant-speed operation.

Maintenance-friendly features include external lubrication points, split-casing for easy impeller access, and integrated performance monitoring. These fans are essential for office buildings, manufacturing plants, and large public venues requiring reliable, efficient airflow.