Helios Fans HRFW EC 355 B

The Helios HRFW EC 355 B is a high-performance EC axial fan designed with a sturdy cylindrical casing made from galvanized sheet steel. It includes flanges on both ends with dimensions and flange hole patterns conforming to DIN 24155 Part 2 standards. The fan is equipped with a standard external terminal box rated IP 55 for secure electrical connections.

The impeller consists of highly efficient, aerodynamically profiled polymer blades, optimized for maximum airflow and balanced dynamically for smooth operation. The fan is suitable for use in environments ranging from ‑30 °C to +60 °C.

Powering the fan is an energy-saving EC external rotor motor with IP 54 protection, offering top-tier efficiency and interference-free performance. The motor utilizes maintenance-free ball bearings and incorporates integrated electronic temperature monitoring for both the motor and electronics.

Speed control is highly versatile: an internal potentiometer enables precise adjustment of the control voltage, allowing any fan speed between minimum and maximum. Additional control options include external speed potentiometers, three-step switches, universal control systems, or electronic differential pressure and temperature controllers, making this fan adaptable to a variety of ventilation system requirements.