Helios Fans VDW EC 355

The Helios VDW EC 355 is a vertical discharge EC roof fan engineered for maximum efficiency and reliable operation. It boasts a seawater-resistant aluminium casing with an integrated protection guard for enhanced durability in outdoor settings. The motor support and base plate, made of galvanised steel, include an inlet cone and threaded bolts for mounting intake air accessories, conforming to DIN 24155 (page 3) standards. A bird guard on the outlet side meets DIN EN ISO 13857 safety requirements.

Equipped with a high-efficiency backward curved centrifugal impeller crafted from polymers, the fan ensures smooth airflow and quiet operation, dynamically balanced in accordance with DIN ISO 1940 – 1.

The fan is driven by an energy-efficient, speed-controllable EC external rotor motor housed in an IP54-rated enclosure. Ball bearings with moisture protection ensure maintenance-free and interference-free performance. Integrated electronic temperature monitoring safeguards the motor and its electronics.

Standard features include an external terminal box and isolating switch with IP65 protection, plus an internal potentiometer for precise speed adjustment between minimum and maximum settings. Users can control fan speed continuously via either an internal potentiometer or an optional universal control system, offering flexible and energy-saving ventilation solutions.