What This Step Covers
Connecting flex duct to return or supply registers
Use the supplied flex duct and adjustable collar to form an airtight seal over the register opening.Securing the connection
Duct tape or approved sealing materials should be used to eliminate bypass air around the collar.Handling multiple return/supply registers
If the system includes multiple returns or supplies, ensure all but one are fully sealed or combined for testing.Ensuring system is test-ready
Double-check that dampers are open and the HVAC fan is off before proceeding.
Tips from the Video
Use the provided flange adapter for quick and tight sealing.
Foam plugs or tape can be used to close off unused ducts.
Always seal unused registers in the duct system to avoid inaccurate test results.
Why This Matters
A clean and secure connection is crucial for valid and repeatable test results. This step ensures airflow is routed solely through the DucTester, allowing the gauge to correctly measure leakage or total system performance.
