The Helios HRFW 560/4 is a high-efficiency axial fan featuring a tubular cylindrical duct made from galvanized sheet steel, with molded flanges on both ends and hole patterns conforming to DIN 24155 standards. An external terminal box is fitted on the casing for easy electrical connection.
This model includes a 7‑blade impeller constructed from thermoplastic, designed for high efficiency and low noise operation. It runs smoothly and vibration-free, dynamically balanced to quality level G 6.3 according to VDI 2060 and DIN ISO 1940 standards.
Powered by a single-phase AC capacitor motor, the fan motor is enclosed and maintenance-free, with integrated thermal contacts for protection. The motor speed can be controlled by voltage reduction, and it features sealed, low-noise ball bearings with long-lasting lubrication. The fan also supports reversible airflow for flexible ventilation solutions.