Before Installing Flex
Use before connecting, cutting, strapping, routing, or insulating flex duct.
You are installing flex to diffusers, boots, collars, boxes, or branch connections.
Stop if
- Ask when flex route is too long, collar is blocked, ceiling conflicts exist, connection is inaccessible, or support method is unclear.
Watch out
- Do not tie only the outer jacket.
- Do not leave the inner liner loose.
- Do not make sharp bends/kinks or use excessive length.
- Do not use flex to solve a coordination problem without direction.
Check
- Collar/boot
- Flex route
- Support straps
- Final connection before cover-up
Steps
- Plan the route so the flex is short, supported, not kinked, and mechanically connected.
- Verify flex size, destination, airflow direction, and collar/boot connection.
- Cut flex cleanly and secure inner liner to collar first.
- Seal inner liner connection per project method.
- Pull insulation/jacket back over connection and secure outer jacket.
- Support flex so it does not sag, kink, crush, or make sharp bends.
- Ask before long loops, tight bends, crushed collar, or reroute around conflicts.
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