The Helios HQD 400÷8÷4 is a directly driven, high-efficiency axial fan designed with a square mounting plate featuring a drawn bell mouth inlet and duct, crafted from galvanised sheet steel with a durable two-coat paint finish.
This model includes a highly efficient, aerodynamically optimized profiled blade impeller made from polymers, dynamically balanced for smooth operation. It is suitable for use in temperatures ranging from ‑30 °C to +60 °C.
Powered by a totally enclosed 3‑phase squirrel cage motor, the fan offers 2‑speed operation through pole switching with Dahlander windings. The motor is maintenance-free and equipped with low-noise, sealed-for-life ball bearings to ensure long-lasting, quiet performance.