Tell someone or document it before you close it up.
Not supporting duct at fan inlet/outlet
Follow the equipment/submittal/manufacturer connection requirement: not supporting duct at fan inlet/outlet.
Keep fan connections aligned, supported, and isolated per the approved detail. A twisted flex connector or tight duct can transfer vibration, noise, and stress into the fan.
Ask when service clearance, vibration isolation, controls, drain, filter/coil access, or manufacturer detail is unclear.
Watch out
Do not use a flex connector as a hanger, offset, or fix for bad alignment.
Check
Identify equipment tag and connection side.
Check submittal/shop drawing/manufacturer detail.
Confirm service clearance and access panels.
Focus on the actual issue: not supporting duct at fan inlet/outlet.
Photograph or mark the condition if someone else needs to approve it.
Steps
Identify equipment tag and connection side.
Check submittal/shop drawing/manufacturer detail.
Confirm service clearance and access panels.
Focus on the actual issue: not supporting duct at fan inlet/outlet.
Photograph or mark the condition if someone else needs to approve it.
Say this to your foreman
In Equipment Connections: RTU, AHU, VAV, Fans & Louvers, I'm looking at: Not supporting duct at fan inlet/outlet. What should I verify before I cut, drill, seal, cover, move, or install?