The Helios VARD 225/4 is a high-pressure pipe fan engineered for ducted ventilation systems. It features a cylindrical housing made from galvanized sheet steel with integrated flanges on both ends, conforming to the DIN 24155 hole pattern. A built-in guide wheel enhances airflow direction and performance. The fan is equipped with a semi-axial impeller composed of eight spatially curved blades made from durable thermoplastic. This model is directly driven, offering reliable and efficient air movement in high-pressure applications.