The Helios HQD 355÷4÷4 is a high-efficiency axial fan designed for industrial ventilation needs, featuring a square mounting plate with an inlet cone to improve airflow. The fan housing is constructed from galvanized sheet steel and coated with two layers of paint for enhanced durability and corrosion resistance.
This model includes a profiled blade impeller made of polymer materials that is aerodynamically optimized and dynamically balanced, ensuring efficient and stable performance. It is rated for operation in temperatures from ‑30 °C to +60 °C.
The fan is driven by a totally enclosed 3‑phase squirrel cage motor equipped with star-delta switching, allowing for two-speed operation. The motor is maintenance-free and uses low-noise sealed-for-life ball bearings, providing reliable and quiet functionality in various industrial applications.