Airflow arrow ignored on terminal unit/damper
Airflow arrows on terminal units and dampers matter. Verify arrow direction before connecting and sealing.
Stop if
- The airflow arrow on this [VAV/damper/unit] points [direction], but the duct route looks [direction]. Can you verify before I connect it?
Watch out
- Do not connect a VAV/damper backward because the duct physically fits.
Check
- Find the airflow arrow or inlet/outlet marking on the VAV/damper/unit.
- Trace duct airflow direction from main to device.
- Compare to submittal/shop drawing if available.
- Check that access and actuator orientation still work.
- Ask before sealing if arrow and duct direction do not agree.
Steps
- Find the airflow arrow or inlet/outlet marking on the VAV/damper/unit.
- Trace duct airflow direction from main to device.
- Compare to submittal/shop drawing if available.
- Check that access and actuator orientation still work.
- Ask before sealing if arrow and duct direction do not agree.
Say this to your foreman
The airflow arrow on this [VAV/damper/unit] points [direction], but the duct route looks [direction]. Can you verify before I connect it?
More in Airflow, Noise, Vibration & TAB