I need to measure the amount of cfm in a 24" pipe, I can calculate the FPM but how can I convert to CFM.
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Re: FPM to CFM
You need to multiply the feet per minute times the crosssectional area of the pipe.
Make sure all units are the same base unit.
feet/minute * square feet = cubic feet/minute
The formula for the area of a circle is Pi*radius², with radius being 1/2 the diameter.
Is the 24" the inside diameter? If so then:
3.14 * (1 foot * 1 foot) = 3.14 square feet
FPM * 3.14 square feet = CFM

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Re: i need to find out how much cfm s i need
I need to find out how many cfms i need to in a 1000 square foot space with 12 foot ceilings
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Re: FPM to CFM
Originally posted by Unregisteredyou will need
1200 cfm
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Re: 800 cfm = howmany fpm
i want to know if a package unit ac has 800 cfm how i know that what is its fpm
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