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Static field route #437

What do I do when excessive sag creates friction?

Airflow/TAB Impacts From InstallationV136 field-polished — distinct TAB/airflow answer

Sagging flex creates friction and can collapse the liner. Support it cleanly before it becomes a hidden airflow complaint.

Open in Field RescueOpen category

Field checklist

Ask foreman

This flex has a low sag between supports at [location]. Do you want another support or a shorter route before cover?

Do not

Do not leave a belly of flex above ceiling and hope TAB can balance it out.

Why it matters

A sagging flex run makes the air path longer and rougher, which can lower diffuser airflow.

Search words: excessive sag friction flex sagging low cfm airflow