Share 'Zero Duct Leakage - Yes it is Possible.'

What does this mean? How can we get to zero duct leakage?   When the testing equipment is not small enough to accurately measure the leakage - then it is called zero - usually below 10 CFM of leakage. Essentially every seam of all the metal and every inside connection of the inner sleeves of flex duct has to have duct mastic at least the thickness of a nickel. This is actually per the Building A…