Had the unpleasant experience of the fan motor in a fume hood dieing. After much time spent with hardware stores and googling part numbers, I gave up on a replacement. On a slow weekend, I opted to yank out the motor and take it into Amre. 5 minutes at the counter and I had an exact match in my hands for under $20 - a far cry from the $200+ a new hood would cost. If you DIY, this should be your first stop for parts.