What is the CFM of air moving through an 8 in × 10 induct if the air velocity is 800 FPM?
A) 8 × 10 = 80 sq in, 80/144 = 0.56 sq ft, 800 × 0.56 = 444 CFM
B) 8 × 10 = 80 sq in, 800/80 = 10 CFM
C) 800 CFM
D) 8 × 10 = 80 sq in, 80/144 = 0.56 sq ft, 800/0.56 = 1,428 CFM
A
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