M mandileng Member Joined Sep 20, 2013 Messages 19 Reaction score 0 Oct 21, 2013 #1 Problem No. 73 , do anyone knows how Af ( fitting area ) =4ft
S saloms Member Joined Dec 22, 2009 Messages 15 Reaction score 0 Oct 22, 2013 #2 mandileng said: Problem No. 73 , do anyone knows how Af ( fitting area ) =4ft Click to expand... The duct is 24" x 24" (2' x 2'), therefore the area is 4 ft^2.
mandileng said: Problem No. 73 , do anyone knows how Af ( fitting area ) =4ft Click to expand... The duct is 24" x 24" (2' x 2'), therefore the area is 4 ft^2.