Overnight Tie-In Was Connected but Airflow and Controls Were Not Verified

Fast answer

Do not treat the area as complete because the sheet metal is connected. Confirm that the designated startup, controls, TAB, commissioning, or operations party verifies equipment status, damper and actuator response, airflow path, alarms, temporary conditions, and the affected occupied zones.

What to check

1. Confirm all temporary caps, blocks, filters, covers, and isolation devices are removed or in the approved position.
2. Check that access doors, dampers, sensors, tubing, and controls disturbed by the tie-in are restored.
3. Document unusual noise, pressure, airflow, temperature, or alarm conditions.
4. Record who accepted the system for reopening.

Do not

Do not adjust controls, bypass alarms, or declare balanced airflow outside your assigned scope.

Ask the foreman

“The overnight tie-in is physically complete, but airflow and controls have not been functionally checked. I verified the duct, access, dampers, and temporary covers. Who is completing the startup verification before this area reopens?”

Why it matters

A connected duct system can still be nonfunctional, reversed, blocked, uncontrolled, or unsafe for the occupied area.