TinnerFlow™2nd YearSound AttenuatorsYELLOW · Check First
Many sound attenuators are directional. Match the airflow arrow/submittal orientation before final connection so the baffles do not create extra pressure drop or noise.
A sound attenuator can look symmetrical from the outside but still have a required airflow direction because of the internal baffle shape.
Check the airflow arrow, tag, submittal, and branch direction. If it is reversed, hold final connection, support it safely, and rotate or reinstall it before startup/TAB. Do not assume it is fine because both flanges bolt up.
Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.