Duct leakage before diffuser reduces delivered air
A leak before the diffuser means the room never gets all the air. Seal the leak path before TAB treats it like a balancing problem.
Watch out
- Do not ignore branch leaks because the diffuser is close by.
Check
- Trace from branch/takeoff to diffuser boot.
- Check collars, flex bands, boot seams, and visible duct joints.
- Feel/listen for air leaks only where safe and accessible.
- Mark/photo the leak location.
- Seal or repair only with approved method/material.
Steps
- Trace from branch/takeoff to diffuser boot.
- Check collars, flex bands, boot seams, and visible duct joints.
- Feel/listen for air leaks only where safe and accessible.
- Mark/photo the leak location.
- Seal or repair only with approved method/material.
Say this to your foreman
I found air leaking before the diffuser at [location]. Do you want this sealed/repaired before TAB continues?
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