The Helios AMW 250/4 is a medium pressure axial fan designed with a cylindrical duct casing and flanges on both ends, conforming to the DIN 24155 Pt.3 hole pattern for easy installation. The robust sheet steel duct casing encloses the impeller and motor, providing reliable operation.
Equipped with a 14-blade polymer impeller, aerodynamically profiled and dynamically balanced to DIN ISO 1940 – 1 class 6.3, this fan ensures smooth and low-vibration performance. It is powered by a totally enclosed, maintenance-free AC condenser motor featuring built-in thermal contacts. Speed control is possible through voltage reduction, and the motor includes low-noise sealed-for-life ball bearings. This fan is designed for non-reversible operation.