Helios Fans VDD EC 500 B

The Helios VDD EC 500 B is a vertical discharge roof fan designed with a seawater-resistant aluminium casing that includes an integrated protection guard for durability and long service life. The motor support and base plate are made of galvanised steel, complemented by an inlet cone to optimize airflow. The base plate is equipped with threaded bolts compatible with intake air accessories, following the DIN 24155 hole pattern (page 3). A bird guard compliant with DIN EN ISO 13857 is fitted on the outlet as standard to prevent bird ingress.

This model utilizes a high-efficiency, backward curved centrifugal impeller constructed from robust polymers, dynamically balanced according to DIN ISO 1940 – 1 for smooth operation and low vibration.

Powered by an energy-efficient, speed-controllable electronically commutated (EC) external rotor motor, it boasts an enclosed design with IP54 protection. The motor is fitted with ball bearings featuring moisture protection insulation, ensuring maintenance-free and interference-free performance.

Integrated electronic temperature monitoring safeguards the motor and electronics during operation. The fan comes standard with an external terminal box and an external isolating switch rated to IP65. An internal potentiometer enables precise control of the voltage, allowing the fan speed to be set anywhere between minimum and maximum. Speed control can be adjusted continuously either via the potentiometer or through a universal control system, offering flexible and efficient ventilation management.