Axial high performance fan with a cylindrical tube sleeve and flanges on both sides, directly driven. The cylindrical tube is made of galvanized sheet steel, featuring an impeller enclosing flange formed on both sides, with a hole pattern to DIN 24155. It includes an external terminal box. The impeller has 7 blades made of thermoplastic, ensuring high efficiency and low operating noise. The fan operates vibration-free due to dynamic balancing according to quality class G 6.3 VDI 2060 and DIN ISO 1940. It is equipped with a three-phase squirrel-cage motor, two-speed with star-delta connection, enclosed design, maintenance-free, and features sealed, low-noise ball bearings with long-term lubrication.