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Static field route #447

What do I do when airflow arrow ignored on terminal unit/damper?

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

Airflow arrows on terminal units and dampers matter. Verify arrow direction before connecting and sealing.

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Field checklist

Ask foreman

The airflow arrow on this [VAV/damper/unit] points [direction], but the duct route looks [direction]. Can you verify before I connect it?

Do not

Do not connect a VAV/damper backward because the duct physically fits.

Why it matters

A backwards terminal/damper can fail startup, controls, TAB, and service access.

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