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louistrader 02-08-2011 09:09 AM

what square footage dertermines per ac vent needed in a room.

Jackofall1 02-08-2011 09:13 AM

Square footage per ac vent????? What question are you asking, what CFM? or what FPM?

seatonheating 02-08-2011 03:52 PM

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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