Axial high-performance fan with square mounting plate, inlet nozzle, directly driven. Square mounting plate with molded nozzle made of galvanized sheet steel. Impeller with 7 blades made of GRP, hub made of galvanized sheet steel, blade position continuously adjustable from the outside when not in motion, high efficiency, balancing quality G 6.3 according to VDI 2060. Single-phase AC capacitor motor, closed design, maintenance-free, with thermal contacts built into the winding, speed controllable by voltage reduction, sealed, low-noise ball bearings with long-term lubrication, reversible.