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Content Gap Batch 9

Straight Duct Before a VAV Inlet

Equipment Connections: RTU, AHU, VAV, Fans & LouversVERIFYField judgment

Core Answer

Provide the straight, stable inlet condition shown by the terminal-unit manufacturer and project design so the sensor and damper see usable airflow.

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What to Check First

Ask Foreman

This VAV inlet is close to [elbow/tap/transition]. Does the approved detail allow this arrangement, or do we need more straight inlet before the box?

Text to Foreman

Do Not Do This

Do not assume every VAV tolerates an elbow or flex connection directly at the inlet.

Why This Matters

Poor inlet conditions create noise, unstable flow readings, balancing problems, and controls complaints.

Verify against: VAV manufacturer instructions, approved submittal, TAB/controls requirements, foreman direction.