variable speed

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...

Hi there, I'm looking to start a new grow soon but I am having trouble finding the correct requirements for my situation. My 2x4x5' tent will be in my basement, near a window which will be ducted to the exhaust. It is imperative that this be an odorless setup, therefore I need to have the...