Helios Fans VDW EC 225 A

The Helios VDW EC 225 A is a vertical discharge EC roof fan engineered for optimized efficiency and reliable performance. It features a casing made from seawater-resistant aluminium with an integrated protection guard for enhanced durability in outdoor environments. The motor support and base plate are crafted from galvanised steel and include an inlet cone designed for improved airflow. The base plate comes with threaded bolts for easy attachment of intake air accessories following the DIN 24155 (page 3) hole pattern. A bird guard at the outlet ensures compliance with DIN EN ISO 13857 safety standards.

This model is equipped with a high-efficiency backward curved centrifugal impeller made from durable polymers, dynamically balanced in accordance with DIN ISO 1940 – 1 for smooth and stable operation.

The fan is powered by a highly efficient, speed-controllable EC external rotor motor. Maintenance-free and interference-resistant, the motor uses ball bearings and features integrated electronic temperature monitoring for both motor and control electronics. It includes an internal potentiometer for fine speed adjustment between minimum and maximum settings. Additionally, the fan supports continuously variable speed control via an external potentiometer or the Helios EUR-EC universal control system. Electrical connections are housed in a weatherproof IP65 terminal box mounted externally on the fan casing.