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Mistake & recovery · #042

Confusing a VAV box with a fan coil unit on drawings

1st YearSystems & Controls

A VAV box modulates airflow from the main supply — no fan, no coil. A fan coil unit has its own fan and heating/cooling coil. They look similar in plan vi…

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Safer field move

A VAV box modulates airflow from the main supply — no fan, no coil. A fan coil unit has its own fan and heating/cooling coil. They look similar in plan view; read the equipment schedule to confirm.

Ask Foreman

Can you verify this before I keep going? I’m looking at: Confusing a VAV box with a fan coil unit on drawings. What’s the approved correction for this job?

Do not

Do not hide, force, cover, or “make it work” if this affects safety, access, airflow, rated assemblies, supports, equipment, or inspection. Stop and verify the approved correction.

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