BrianW - AC fans are tricky when trying to control speed with a dimmer switch. A single speed fan only has one winding, while multi-speed fans have multiple windings, one for each speed. I noticed the link was for a 10 inch fan. You would be better off getting a cheap (less than $10) 3 speed desk fan at Walmart, Target, etc. Toss the bits you don't need and go from there. You also might have to make some sound suppression because it might be a tad noisy.
??? - Why buy a 550 CFM fan if you are going to throttle it back? You might be be better off using a lower-rated AC fan. Less noise, less $'s and no need to fool with speed control. Just a thought.
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