Helios Fans HRFD 500/6

The Helios HRFD 500/6 is a robust axial duct fan designed for efficient airflow in ducted ventilation systems across industrial and commercial settings. Housed in a cylindrical duct made of corrosion-resistant galvanised sheet steel, the unit includes two standardised flanges for seamless integration into ductwork, with flange dimensions conforming to DIN 24155. A weather-protected terminal box is mounted on the outer casing for secure electrical connection.

Equipped with a precision-engineered, dynamically balanced impeller made from high-strength polymers, the HRFD 500/6 delivers aerodynamically optimised airflow while maintaining low noise levels. This impeller design supports efficient operation in a wide temperature range from ‑30°C to +60°C.

The fan is powered by a totally enclosed 3‑phase squirrel cage motor with built-in thermal contacts, offering enhanced protection and durability. The motor is speed controllable through voltage reduction and is completely maintenance-free, featuring sealed-for-life ball bearings for silent and reliable operation. The HRFD 500/6 is an ideal solution for high-volume air movement in demanding ventilation applications.