Originally Posted by
Jared Mitchell
Would the total vent space need to be 144 in^2 or would each vent need to be 144in^2?
The minimum net free vent area of EACH opening is 100 square inches. Install a louver and the net free vent area is reduced, which is why a metal louver opening needs to be 144 square inches.
But, that is the minimum based on the information you gave, there are many variables which would affect that in various ways.