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CFMroom = CFMtotal x (Qhr / Qs)

Where:

 

 CFMroom        = Heating supply CFM required for room, CFM
 CFMtotal        = Total heating supply air required for building, CFM
 Qhr                = Heat loss for room, Btuh
 Qs                = Total heat loss on building, Btuh

 

Ref: (GRP-158) - A.69