What do I do when diffuser boot not sealed or aligned?
Airflow/TAB Impacts From InstallationV136 field-polished — distinct TAB/airflow answer
Make sure the diffuser boot is sealed, aligned, and connected to the right device before ceiling close.
Field checklist
- Match the boot to the diffuser/grille size and room tag.
- Check that the boot is square with the ceiling/device layout.
- Verify flex or branch connection is sealed at the collar.
- Look for insulation or ceiling conflicts around the boot.
- Ask before covering if boot/device alignment is off.
Ask foreman
This boot at [room/grid] is not lining up/sealed right. Do you want me to adjust it before ceiling closes?
Do not
Do not leave a boot half-sealed or aimed wrong because the tile hides it.
Why it matters
The diffuser can only deliver what the boot and branch provide. A bad boot connection becomes a TAB or ceiling punch item.
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