What do I do when not matching diffuser neck size to branch size?
Print Reading, Tags & LayoutFoundation print-reading starter — verify latest revision/detail
Match diffuser neck size to the branch and device schedule before connecting.
Field checklist
- Find diffuser tag.
- Check neck size in schedule.
- Compare to branch size and boot.
- Confirm transition/adapter if sizes differ.
- Ask before forcing a mismatch.
Ask foreman
This diffuser neck and branch size do not match. What adapter/transition is required?
Do not
Do not force a branch onto a diffuser neck because it is close enough.
Why it matters
A bad neck connection creates leaks, noise, bad airflow, and ugly ceiling work.
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