The AHRI definition of standard air is:
A) 400 CFM per ton.
B) Air at a temperature of 0°C with a relative humidity of 50%.
C) Air weighing 0.075 lb/ft3 at 70°F with a barometric pressure of 29.92 in Hg.
D) 78% nitrogen, 21% oxygen, and 1% "other" gases.
C
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