Helios Fans RR 200 A

The Helios RR 200 A is a compact and reliable in-line centrifugal fan, engineered for use in circular ducting systems where consistent airflow is needed despite high resistance. Featuring a two-speed operation, it’s ideal for medium to smaller air volumes. The unit’s casing is constructed from durable galvanised sheet steel with standard-size duct spigots for quick connection. A backward-curved polymer impeller is directly mounted to the motor and dynamically balanced to ensure quiet performance and high efficiency. The maintenance-free, single-phase external rotor motor includes thermal contacts and sealed-for-life ball bearings. Speed regulation can be achieved using an electronic controller, a 5‑step transformer controller, or the optional DS 2/2 switch (Ref. no. 1267).