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Whole house fan motor | 16 comments (16 topical, 0 editorial)
Re: Whole house fan motor (3.00 / 0) (#16)
by desertcoyote on Fri Sep 26th, 2008 at 10:13:36 PM MST
(User Info)

I have not read all the comments so sorry if I am repeating something here.
I have combated this problem in the past using the 'fan law'. That is the CFM is linear to the RPM but the HP required to drive it is 1/RPM^2. For example is the fan is rated at say 10,000 cfm at 1HP-1760 RPM, then you can get 5000 cfm 88 rpm at 1/4 HP.
Good deal. Plus if u get a variable speed DC motor drive you can get massive evacuation when needed and throttle it back to maintain a minimum amount of air flow to keep you from being miserable.


Whole house fan motor | 16 comments (16 topical, 0 editorial)

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