Helios Fans HRFW EC 450 B

The Helios HRFW EC 450 B is a high-efficiency EC axial fan designed for superior airflow performance and energy savings. Built with a durable cylindrical casing made from galvanized sheet steel, the fan includes flanges on both ends in compliance with DIN 24155 Part 2 standards. A weather-resistant IP55 terminal box is conveniently mounted on the exterior of the housing for easy electrical connection.

Its aerodynamically refined impeller is constructed from high-grade polymers, featuring a profiled blade design that ensures optimal efficiency and minimal operating noise. The impeller is dynamically balanced for vibration-free operation, and the unit is rated for use in environments with temperatures ranging from ‑30 °C to +60 °C.

Powered by a premium EC external rotor motor in IP54 protection class, the HRFW EC 450 B delivers high performance with excellent electromagnetic compatibility (EMC). The motor is maintenance-free, equipped with sealed ball bearings for quiet operation and longevity. Integrated electronic temperature monitoring enhances operational safety for both the motor and control electronics.

For maximum flexibility, the fan includes an internal potentiometer to manually set any operating speed within the available range. It also supports external control options, including a variable speed potentiometer, three-step switch, or connection to a universal controller or electronic differential pressure/​temperature control system — offering precise speed regulation for various applications.