My Grainger catalog (#389) shows a few supply/exhaust fans 36" blade
in frames ranging from 39 to 42 inches...but the bad news...prices
range from $ 400-500. might be in your range...a little pricey for
me.
Next suggestion, watch for shop closings, sales, yard sales, auctions.
A lot of times you can pick one up real cheap. I found a 30" (36"
frame) at a closing sale for 20 bucks...two speed reversing...got in
in the attic now to be installed to pull the hot air thru...will also
put some "vents" in the shop ceiling to move some of that air also..
good luck
john
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