Acoustic liner with duct size not coordinated

Acoustic liner changes inside duct size and airflow area. Verify liner thickness and duct size before installing or connecting.

Stop if

• This duct is lined. Is the shown size the metal size or the clear airflow size after liner?

Watch out

• Do not assume lined duct has the same clear opening as unlined duct.

Check

• Check whether the duct size shown is lined size, outside metal size, or clear inside size.
• Verify liner thickness at transitions, taps, dampers, and equipment.
• Check for liner edges that could peel or obstruct airflow.
• Ask before modifying a lined piece.

Steps

• Check whether the duct size shown is lined size, outside metal size, or clear inside size.
• Verify liner thickness at transitions, taps, dampers, and equipment.
• Check for liner edges that could peel or obstruct airflow.
• Ask before modifying a lined piece.

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