Long flex run instead of rigid duct
Long flex is usually a shortcut that turns into airflow loss. Verify whether hard duct or a shorter route is required.
Stop if
- This flex route is about [length] with [bends/sag]. Do you want hard duct or a shorter route before I finish it?
Watch out
- Do not use extra flex to solve every layout problem.
Check
- Measure the actual flex length, not the straight-line distance.
- Check for sag, extra loops, hard bends, and support spacing.
- Compare the route to the drawing/shop detail.
- Ask whether hard duct should replace part of the flex run.
- Correct the route before ceiling close.
Steps
- Measure the actual flex length, not the straight-line distance.
- Check for sag, extra loops, hard bends, and support spacing.
- Compare the route to the drawing/shop detail.
- Ask whether hard duct should replace part of the flex run.
- Correct the route before ceiling close.
Say this to your foreman
This flex route is about [length] with [bends/sag]. Do you want hard duct or a shorter route before I finish it?
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