The Helios HRFW 355/4 is a high-performance axial fan featuring a cylindrical duct constructed from galvanized sheet steel, with flanges on both ends for secure installation. The flange dimensions and fixing holes conform to DIN 24155 standards. The fan includes a terminal box mounted on the outer casing for easy wiring.
It is equipped with a highly efficient, aerodynamically optimized profiled blade impeller made of polymers, dynamically balanced to ensure smooth operation. The fan is suitable for environments with temperatures ranging from ‑30 °C to +60 °C.
The unit is powered by a totally enclosed AC condenser motor with built-in thermal protection. The motor speed is adjustable through voltage reduction, and it features low-noise, sealed-for-life ball bearings for maintenance-free operation. Additionally, the fan is reversible, allowing for flexible airflow direction.