Vetus Louvered Air Suction Vents-ASV90 - In order to burn 1 lb. of fuel - ca. 0.14 U.S. gallon a quantity of 16 lbs of air is needed - ca. 438 cu.ft. at 1 atmosphere. Free Flow Area in.2.56.2 - E.3 inch - A.26-3/8 inch - B.25-5/8 inch - C.6-3/4 inch - D.6 inch.
