How to segment and seal for duct leakage testing, and how to record the pressure differential

When performing a leakage test after HVAC duct installation, the biggest fear is testing the entire run at once; if the pressure drops, you won't know where the leak is. When the site is rushing the schedule, some might say to wait until commissioning, but once the ceiling is closed, the cost of rework becomes high. My approach is to segment by system and floor, first ensuring all access doors…