1.) First find the volume of the bathroom. Volume = length x width x height
2.) Find the CFM (cubic feet per minute). Volume / 7.5

Walter

wrote in message
...
On Tue, 5 Feb 2008 21:57:02 -0500, "Walter Cohen"
wrote:

I did the usual CFM calculation for my bathroom and came up with 68 CFM.
So whay don't you share what the "usual cfm calculations" with us?

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