Helios Fans GBD EC 500 A

The Helios GBD EC 500 A is a compact, energy-saving ventilation unit designed with intake and extract spigots, featuring flexible sleeves to minimize vibration transmission. The unit includes adjustable side panels to adapt to various structural requirements and can be easily installed using standard crane hooks.

Constructed with a self-supporting frame of aluminium hollow sections, the housing includes double-walled panels that are 20 mm thick, made from galvanised steel. These panels are internally lined with non-combustible mineral wool to provide both thermal and acoustic insulation. Panels can be substituted with optional accessories like weather louvres or condensate trays as needed. Additional fittings such as wall brackets or a protective roof can be mounted either internally or externally.

The fan uses a free-running, backward-curved centrifugal impeller made from aluminium, directly driven and engineered for high efficiency and low noise. The impeller and motor are dynamically balanced to DIN ISO 1940 Pt.1 – class 6.3 standards.

Power is supplied by an EC external rotor motor that is energy-efficient, speed-adjustable, and rated to IP54 for protection. It operates maintenance-free with interference-free performance, supported by ball bearings. The system includes built-in electronic monitoring for both the motor and electronics. An integrated internal potentiometer enables precise control of fan speed between the minimum and maximum range, while additional speed regulation can be achieved through an external potentiometer or a EUR-EC universal controller. Electrical connection is via a standard IP54-rated terminal box.