Helios Fans HRFW EC 500 B

The Helios HRFW EC 500 B is a robust and energy-efficient EC axial fan designed for demanding ventilation tasks in commercial and industrial applications. Its cylindrical casing, made from galvanized sheet steel, features flanges on both ends for easy integration with ducting systems and complies with DIN 24155 Part 2 for standardized connection points. The unit is equipped with a weather-sealed IP55-rated external terminal box for safe and simple wiring.

At the core of the fan is a dynamically balanced impeller with aerodynamically optimized blades made from durable polymer materials. This design ensures quiet, high-performance airflow with minimal vibration and is suitable for operation in temperatures ranging from ‑30 °C to +60 °C.

The fan is driven by a high-efficiency EC external rotor motor rated to IP54, offering excellent performance with reduced energy consumption. The motor is maintenance-free, features low-noise ball bearings, and is engineered for electromagnetic compatibility (EMC), making it ideal for sensitive environments.

An integrated electronic monitoring system safeguards the motor and electronics from temperature-related damage. The HRFW EC 500 B includes an internal potentiometer for speed adjustment and supports a variety of control methods — ranging from external speed potentiometers to three-step switches or full-range variable control via universal or differential pressure/​temperature controllers. This provides flexible, intelligent control tailored to specific system requirements.