I’m going with an 18” 6-blade mech fan because I could get one this week. I’d like to get the 7-blade version, but do you know if that 7-blade really pulls that much more air? Is it worth changing to it over the winter (Ex.)?
Yes the seven blade moves considerable more air.
To make room for the seventh blade they also have a deeper pitch.
Go direct drive the clutches dont really work that well
