Helios Fans HRFW EC 400 A

The Helios HRFW EC 400 A is an advanced EC axial fan designed with a robust cylindrical casing constructed from galvanized sheet steel. It features flanges on both ends, with dimensions and flange holes manufactured according to DIN 24155, Part 2. The fan includes a standard external terminal box rated IP 55 for secure and accessible electrical connections.

This fan utilizes a highly efficient impeller made from profiled polymer blades, which are aerodynamically optimized for the specific application and dynamically balanced to ensure quiet and stable operation. It is suitable for operating temperatures between ‑30 °C and +60 °C.

The fan is powered by an energy-saving EC external rotor motor with IP 54 protection, delivering top efficiency and reliable, interference-free performance. The motor employs maintenance-free ball bearings and incorporates integrated electronic temperature monitoring for both the motor and its electronics.

For speed control, the fan comes equipped with an internal potentiometer that allows precise adjustment of the control voltage to set any speed between minimum and maximum. It also supports continuous speed variation via an external potentiometer, three-step switches, universal control systems, or electronic differential pressure and temperature controllers, making it highly adaptable for various ventilation needs.