Helios Fans VARW 355/4

The Helios VARW 355/4 is a high-pressure in-line pipe fan designed for efficient ventilation in ducted systems. It features a cylindrical pipe housing made from galvanized sheet steel, equipped with flanges on both ends that conform to DIN 24155 standards. A built-in guide wheel ensures smooth airflow and improved system performance.

The fan incorporates a semi-axial impeller with eight spatially curved blades made from durable thermoplastic. The impeller is dynamically balanced to class G 6.3 according to VDI 2060 and DIN ISO 1940 standards, enabling vibration-free operation.

It is driven by a single-phase AC capacitor motor with a closed design, built-in thermal winding protection, and sealed, low-noise ball bearings with long-term lubrication. The motor is maintenance-free and allows for speed control via voltage reduction. It is non-reversible, making it suitable for fixed-direction, high-performance duct applications.