Helios Fans HRFW EC 400 B

The Helios HRFW EC 400 B is a high-efficiency EC axial fan with a sturdy cylindrical casing made from galvanized sheet steel. It is designed with flanges on both ends, following the dimensions and flange hole specifications according to DIN 24155, Part 2. The fan includes an externally mounted standard terminal box rated IP 55 for easy and safe electrical connections.

The fan’s impeller is constructed from profiled polymer blades, precisely aerodynamically optimized for optimal performance and dynamically balanced to ensure quiet and smooth operation. It is suitable for a temperature range from ‑30 °C up to +60 °C.

Equipped with a speed-controllable, energy-saving EC external rotor motor, this fan offers the highest efficiency in protection class IP 54. The motor is maintenance-free with low-noise ball bearings and provides excellent electromagnetic compatibility (EMC) for interference-free operation. It features integrated electronic temperature monitoring for both the motor and its electronics.

For flexible speed control, the fan comes standard with an internal potentiometer, allowing adjustment of control voltage for any fan speed between minimum and maximum. Additionally, speed control can be managed continuously via an external potentiometer, a three-step switch, a universal control system, or electronic differential pressure/​temperature controllers, enabling versatile integration into various ventilation systems.