Helios Fans RR 100 C

The Helios RR 100 C is a centrifugal fan designed for inline installation in circular ducting, suitable for medium to smaller airflow volumes facing high resistance. Its galvanized sheet steel casing includes spigots compatible with standard duct sizes for easy integration. Equipped with a backward-curved centrifugal impeller made from durable polymers, the impeller is directly mounted on the motor and dynamically balanced as a unit to ensure quiet operation and optimal efficiency. The fan features a totally enclosed, single-phase external rotor motor that is maintenance-free, includes thermal protection, and sealed-for-life ball bearings for longevity. Speed control options include electronic controllers, a 5‑step transformer controller, or two-speed operation using the DS 2/2 accessory (Ref. no. 1267). This makes the RR 100 C a reliable and efficient choice for ventilation systems requiring adaptable airflow and quiet performance.