The axial flow fan features blades mounted on a central hub, which accelerate air axially through the fan. Its simple propeller-like design produces large volumes of airflow at low to moderate static pressures, making it ideal for general ventilation and cooling.
Axial fans are constructed with steel, aluminum, or composite blades in sizes ranging from small panel fans to large tunnel fans exceeding 3 meters in diameter. Their open, direct-drive or belt-driven arrangements provide easy access for inspection and maintenance.
Modern axial flow fans integrate IE3 or IE4 premium-efficiency motors and can be paired with VFDs for variable-speed operation, matching airflow to demand and saving energy. Aerodynamic blade profiles and swept-back designs reduce noise and increase efficiency.
Common applications include data center rack cooling, tunnel ventilation, roof exhaust units, and process air recirculation. Optional features include inlet cones for improved suction, acoustic enclosures for noise reduction, and explosion-proof motors for hazardous environments.