I use this fan to cool my room, but sometimes it is too fast and I have to frequenctly turn it on and off to keep normal temperature. Maybe it is possible to reduce the speed by connecting a resistor in series or using a variac. The fan uses some form of shaded pole motor (the manufacturer calls it "Alveolate" and compares it to the standard shaded pole motor (pointing out that its motor is better). The "Alveolate" motor needs a starting capacitor.
I have searched the internet and this site but found contradicting answers. Some say that the speed can even be reduced by using a triac while others say that a resistor in series can destroy an induction motor. The fan motor is 60W.