Static field route #434

What do I do when return duct leaks pulling ceiling/plenum air?

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

Return leaks can pull ceiling/plenum air instead of designed room air. Seal the return path per the approved method before startup.

Field checklist

This return duct has leakage/open gaps at [location]. Is this supposed to be sealed ducted return, or is this area intentionally plenum return?

Do not leave return leaks because “it is only return.”

Return leaks can pull dust, heat, odors, or ceiling air and can change system balance.

Search words: return duct leaks plenum air return leakage ceiling air