if it doesnt draw 20 amps( minimum), it isnt moving much air.
They( spal) make 4 different 16 inch fans with low cfm and amps
Two draw 8.5, the other two both draw 13. None of them move much air.
Assuming you are right, you must have one of these....If what you have doesn't draw 20 amps
If that is the case, you need a real fan
