7 hp moves 18,000 cfm in my spray booth

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Posted by chriscase on Saturday, September 17, 2005 at 12:25PM :

In Reply to: Re: Fan - what is the cfm? posted by Bruce B. on Friday, September 16, 2005 at 8:17PM :

My guess is that the high performance folks that sell the electric fans use 7,000 rpm as their basis. Thats double the speed that a flathead is capable of, so it's 4 times the horsepower....so a stock 230 uses 1 3/4 hp. Then, there ain't no free lunch, the electric fan also needs horsepower to run...

My guess is that a thermostatic fan clutch would be the best of both worlds- "7 hp fan" when needed, otherwise freee wheeling, wasting almost no torque.

Follow Ups:

Re: 7 hp moves 18,000 cfm in my spray booth - MoparNorm 3:39PM 09/17/2005

Yes, but an electric fan will never whis... - chriscase 9:44PM 09/17/2005
- Re: Yes, but an electric fan will never whis... - MoparNorm 11:19AM 09/18/2005

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