Helios Fans GBW EC 355

The Helios GBW EC 355 is a high-performance cubic ventilation box designed for efficient air intake and extraction in commercial and industrial settings. It features intake and extract spigots with flexible sleeves that effectively reduce vibration transmission, while the variable side panels can be adapted to suit different structural requirements. Installation is simplified using standard crane hooks for easy positioning.

Its durable frame is made from aluminium hollow sections forming a self-supporting enclosure, with double-walled side panels constructed from galvanised sheet steel. These panels are 20 mm thick and lined with non-combustible mineral wool, providing excellent sound and thermal insulation. The enclosure panels are replaceable and compatible with various accessories, including weather louvres and condensate trays. Additional mounting options such as wall brackets and weather protection roofs are available for both interior and exterior use.

At the heart of the unit is a free-running backward curved centrifugal impeller made of aluminium, directly driven for maximum energy efficiency and quiet operation. The impeller and motor assembly is dynamically balanced to comply with DIN ISO 1940 Pt.1 class 6.3 standards, ensuring smooth, vibration-free performance.

The fan is powered by an energy-saving EC external rotor motor with IP54 protection rating, offering high efficiency and reliable operation. This motor is maintenance-free, interference-resistant, and ball bearing mounted. It includes integrated electronic temperature monitoring to protect both the motor and electronic components.

Speed control is versatile with a standard internal potentiometer allowing seamless adjustment of fan speed from minimum to maximum. Users can also employ an external potentiometer or the universal EUR-EC control system for stepless speed regulation. Electrical connections are facilitated via a standard IP54 terminal box mounted on an extended cable.

The Helios GBW EC 355 offers a flexible, durable, and energy-efficient ventilation solution suitable for a wide range of commercial applications requiring reliable air handling and noise reduction.