Ventilator, 80x80x25mm (1200/1650/2000 RPM, 28.9/41.4/50.4 m/h, 7.9/12.9/16.1 dBA), rotor ultrasilentios SSO2, Flow Acceleration Channels, AAO Frame (Advanced Acoustic Optimisation), Smooth Commutation Drive 2 (SCD2), include: adaptoare U.L.N.A….