Is 5.3 scfm smaller than 6.5 cfm?

Yes, 5.3 standard cubic feet per minute (scfm) is smaller than 6.5 cubic feet per minute (cfm). While both measurements indicate flow rates, they are in different contexts—scfm refers to standard conditions, while cfm is a general measurement. However, since 1 scfm is equivalent to 1 cfm under standard conditions, 5.3 scfm is indeed less than 6.5 cfm.