Helios Fans RR EC 250 A

The Helios RR EC 250 A is an efficient EC radial duct fan engineered for direct installation within duct systems. It features a durable housing made from galvanized sheet steel, fitted with round connecting pieces that align with standard pipe dimensions for straightforward integration. The fan incorporates a radial impeller with backward curved plastic blades, securely pressed onto the motor and dynamically balanced as a single unit to ensure quiet operation and high performance. Driven by an energy-saving, speed-controllable EC external rotor motor with an IP54 protection rating, this fan offers maintenance-free and radio interference-free operation with durable ball bearings. Integrated electronic temperature monitoring safeguards the motor and electronic components. The fan speed is infinitely adjustable via an internal potentiometer or a universal control system. Electrical connections are conveniently made through a standard IP54 terminal box mounted on the housing’s exterior for ease of access