jermfab
Cast Iron
- Joined
- Jul 25, 2013
- Location
- atlanta, ga
I have this exhaust fan:
Made by a company called: “Coolair” in Jacksonville, FL. Doesn’t match anything they currently produce.
I got it with a 1/2-HP/1725 rpm motor.
As that motor was mounted on plywood, I’m hazarding that it is not the original motor for the fan.
The blade design seems like this fan should move a lot of air, it always worked, but I think it can work better.
Someone gave me this motor some years back, I’m tired of tripping over it and think this may be a good application for it:
It’s a cheap Chinese/Taiwanese thing, but ought to work for this application.
Now! On to my question(s)
What is the best way to determine the operating rpm of the fan blades?
Obviously I could just size the pulley commiserate to the rpm change in the motors, but as I’m also quadrupling the HP I’m wondering if I can turn the fan blades faster, before I have cavitation issues.
Hoping one of the smart fellers here can put me on a better path.
Be safe
Jeremy
Made by a company called: “Coolair” in Jacksonville, FL. Doesn’t match anything they currently produce.
I got it with a 1/2-HP/1725 rpm motor.
As that motor was mounted on plywood, I’m hazarding that it is not the original motor for the fan.
The blade design seems like this fan should move a lot of air, it always worked, but I think it can work better.
Someone gave me this motor some years back, I’m tired of tripping over it and think this may be a good application for it:
It’s a cheap Chinese/Taiwanese thing, but ought to work for this application.
Now! On to my question(s)
What is the best way to determine the operating rpm of the fan blades?
Obviously I could just size the pulley commiserate to the rpm change in the motors, but as I’m also quadrupling the HP I’m wondering if I can turn the fan blades faster, before I have cavitation issues.
Hoping one of the smart fellers here can put me on a better path.
Be safe
Jeremy