Helios Fans VDW EC 225 B

The Helios VDW EC 225 B is a vertical discharge EC roof fan designed for efficient and dependable ventilation. Its casing is made from seawater-resistant aluminium and includes an integrated protection guard for long-lasting outdoor use. The motor support and base plate are constructed from galvanised steel and feature an inlet cone to optimise airflow. Threaded bolts on the base plate allow for easy attachment of intake air accessories, following the DIN 24155 (page 3) hole pattern. A bird guard fitted on the outlet meets DIN EN ISO 13857 safety standards.

This model features a high-efficiency backward curved centrifugal impeller made from galvanised sheet steel, dynamically balanced according to DIN ISO 1940 – 1 to ensure smooth and consistent operation.

The fan is powered by an energy-efficient, speed-controllable EC external rotor motor with maximum efficiency. It is maintenance-free and interference-resistant, equipped with ball bearings and integrated electronic temperature monitoring for both motor and electronics. An internal potentiometer allows for precise speed adjustment between minimum and maximum levels. Additionally, the fan supports continuously variable speed control via an external potentiometer or the Helios EUR-EC universal control system. Electrical connections are conveniently housed in a weatherproof IP65 terminal box mounted externally on the casing