Helios Fans HRFW EC 355 A

The Helios HRFW EC 355 A is a high-performance EC axial fan designed with a durable cylindrical casing made from galvanized sheet steel, featuring flanges on both ends that conform to DIN 24155 Part 2 standards. An external terminal box with IP 55 protection is mounted on the casing for secure and accessible electrical connections.

Equipped with a highly efficient, aerodynamically profiled polymer blade impeller, this fan ensures optimal airflow and quiet operation. The impeller is dynamically balanced and engineered to perform reliably in ambient temperatures ranging from ‑30 °C to +60 °C.

Powered by an energy-saving EC external rotor motor with protection class IP 54, the fan offers outstanding efficiency and low maintenance. The motor operates interference-free, boasts excellent electromagnetic compatibility (EMC), and runs on durable ball bearings for extended life.

Integrated electronic temperature monitoring protects both the motor and control electronics. Speed adjustment is highly flexible, with an internal potentiometer allowing continuous control between minimum and maximum speeds. External control options include a speed potentiometer, a three-step switch, universal control systems, or electronic differential pressure and temperature controllers, providing adaptable operation tailored to various ventilation requirements.