Helios Fans HQD 355/4

The Helios HQD 355/4 is a high-efficiency axial fan designed for industrial ventilation applications. It features a square mounting plate with an integrated inlet cone to enhance airflow. The fan casing is made of galvanized sheet steel and coated with two layers of protective paint to ensure durability and resistance to corrosion.

This model uses a profiled blade impeller manufactured from polymer materials, which is aerodynamically optimized and dynamically balanced to provide efficient and smooth operation. The fan is suitable for use in temperatures ranging from ‑30 °C to +60 °C.

The fan is powered by a totally enclosed 3‑phase squirrel cage motor that includes built-in thermal contacts for motor protection. Maintenance-free and equipped with low-noise sealed-for-life ball bearings, the motor’s speed can be controlled by voltage reduction, offering adaptable performance for a variety of ventilation needs.