speed controller

i have been looking at a 7.5 amp variac speed controller for a 10 inch 4250m3 6amp 550 watt tornado box fan shown in the picture its to powerful for my needs so its either a speed controller to lower the speed or buy something different like 10 inch isomax something like that..anyway Has any...

Hello, I recently bought a variac fan speed controller which I have wired and installed a single socket onto today. The problem is when I went to take off the speed controller built into the wire of my fan This fan, its the 200mm version with 3 speed control...