Helios Fans HRFW EC 250 A

The Helios HRFW EC 250 A is a high-performance axial fan designed with a cylindrical casing made from galvanized sheet steel, featuring flanges on both ends according to DIN 24155 Part 2. An external terminal box rated to IP 55 ensures safe and accessible electrical connections.

Equipped with a highly efficient, aerodynamically optimized polymer impeller, the fan delivers excellent airflow performance while operating quietly and smoothly due to dynamic balancing. It is suitable for use in temperatures ranging from ‑30 °C up to +60 °C.

The fan incorporates an energy-saving EC external rotor motor rated to protection class IP 54, offering top-tier efficiency. This maintenance-free motor ensures interference-free operation with excellent electromagnetic compatibility (EMC) and utilizes durable ball bearings. The integrated electronic temperature monitoring system protects both the motor and control electronics.

Control flexibility includes an internal potentiometer allowing for precise speed setting between minimum and maximum, with optional external continuous speed control via a potentiometer, a three-step switch, or a universal control system. Additionally, control can be adapted via electronic differential pressure or temperature controllers, making the HRFW EC 250 A suitable for a wide range of demanding ventilation applications.