Axial high-performance fan with wall mounting ring, inlet nozzle, directly driven. Wall ring made of galvanized sheet steel, painted twice, color papyrus white, nozzle with protective grille on the suction side. Connection box on the motor. Impeller with high-performance characteristics with profiled blades made of plastic, aerodynamically optimized for the application, dynamically balanced. Three-phase squirrel-cage motor, speed controllable by reducing the voltage, closed design, maintenance-free, sealed, low-noise ball bearings with long-term lubrication.