Helios Fans RR EC 250 B

The Helios RR EC 250 B is an advanced EC radial duct fan designed for direct installation in duct systems. It comes with a robust housing made of galvanized sheet steel, equipped with round connecting pieces that conform to standard pipe sizes for easy integration. The fan’s radial impeller features backward curved plastic blades, which are pressed directly onto the motor and dynamically balanced as a unit to provide quiet operation and high efficiency. Powered by an energy-saving, speed-controllable EC external rotor motor with an IP54 protection rating, the fan operates maintenance-free and without radio interference, supported by reliable ball bearings. It includes integrated electronic temperature monitoring for both the motor and electronics to ensure optimal performance and protection. Speed control is infinitely variable via a potentiometer or universal control system. The electrical connection is facilitated by a standard terminal box mounted externally on the housing, also rated IP54.