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Old 02-08-2011, 09:09 AM   #1
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what square footage dertermines per ac vent needed in a room.

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Old 02-08-2011, 09:13 AM   #2
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Square footage per ac vent????? What question are you asking, what CFM? or what FPM?

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Old 02-08-2011, 03:52 PM   #3
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It doesn't.

Manual J will give you the heat loss/gain and then this value is applied to a formula to calculate CFM.

Take the CFM and apply it to Manual D and you have your answer.
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