Question: What is the ratio of humidity ratio of entering and discharging air?
Options
A : W2 / W1 = (hs2 ? hfw) + ha2 ? ha1 / (hs1 ? hfw)
B : W1 / W2 = (hs1 ? hfw) + ha2 ? ha1 / (hs2 ? hfw)
C : W1 / W2 = (hs2 ? hfw) + ha2 ? ha1 / (hs1 ? hfw)
D : W1 / W2 = (hs2 ? hfw) + ha1 ? ha2 / (hs1 ? hfw)
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