Helios Fans SKRW EC 450÷70÷40

The Helios SKRW EC 450÷70÷40 is a rectangular EC centrifugal fan designed for in-line installation within rectangular duct systems. Its compact casing is constructed from galvanised steel, flanged at both ends, and acoustically lined with 50 mm thick mineral fibreboard for superior sound insulation. The swing-out motor and impeller unit allow easy access for maintenance and cleaning.

This fan features a high-performance centrifugal impeller with backward curved aluminium blades, ensuring vibration-free operation through precise dynamic balancing. The aerodynamically optimized inlet nozzle enhances airflow efficiency.

Powered by an energy-saving, speed-controlled EC external rotor motor with IP44 protection, the fan delivers maximum efficiency and reliability. The motor is maintenance-free, ball bearing mounted, and operates without radio interference. Integrated electronic temperature monitoring protects the motor and its electronics. It includes a built-in internal potentiometer for setting fan speed between minimum and maximum. Additionally, stepless speed control can be managed via an external potentiometer or the universal EUR-EC control system. Electrical connections are handled through a standard terminal box (IP54) mounted on an extended cable.