How does a duct blaster measure the amount of duct leakage?

What will be an ideal response?


All duct outlets are sealed and a duct blaster is used to pressurize the entire duct system to between 0.5 inches water column and 1.0 inch water column. After pressurizing the duct, the amount of air flow is measured. The amount of air flowing is the amount leaking out of the ductwork.

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