What do I do if a zone is starved for air and the balancer says my fitting is causing turbulence?

Inspect the interior of the problematic fitting using a small mirror tool or borescope camera. Check if a splitter damper or internal acoustic lining layer has come loose and flipped across the air stream. If the fitting design itself is the issue (such as a square throat elbow fabricated without turning vanes), you must modify the run on-site by retrofitting engineered turning vanes inside the turn or replacing the choked fitting with a smooth radius transition turn.

['Inspect the interior of the problematic fitting using a small mirror tool or borescope camera. Check if a splitter damper or internal acoustic lining layer has come loose and flipped across the air stream. If the fitting design itself is the issue (such as a square throat elbow fabricated without turning vanes), you must modify the run on-site by retrofitting engineered turning vanes inside the turn or replacing the choked fitting with a smooth radius transition turn.']

Stop if

• 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.

Steps

• Inspect the interior of the problematic fitting using a small mirror tool or borescope camera. Check if a splitter damper or internal acoustic lining layer has come loose and flipped...

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