TinnerFlow
Exposed Architectural Duct ยท Exposed Architectural

Exposed spiral with linear diffuser

Architectural air-distribution assembly

ConnectionFactory saddle/boot connection
SupportRotation-resistant supports

Before you start

  • Confirm diffuser length, slot location, room-axis alignment, factory saddle or boot, duct seam location, hanger clearance, support against rotation, and required internal sealing.
  • Field-check the diffuser line from the room below before cutting the duct.
  • Verify the cutout will not cross or weaken the spiral seam, bead, joint, or support point.
  • Stage the factory connection, layout template, cutting tools, reinforcement if specified, sealant, and rotation-resistant supports.

Tools and materials

Exposed spiral duct, approved linear diffuser and factory saddle or boot, layout template, laser, level, marker, approved cutting tools, deburring tools, fasteners, sealant, rotation-resistant hangers, clean gloves, and interior-cleaning supplies.

Lay it out

  1. Laser the diffuser centerline to the room or architectural axis.
  2. Transfer the exact opening and fastener pattern to the duct.
  3. Check seam, hanger, fitting, and joint clearance before cutting.

Set and support it

  1. Support the spiral duct on both sides of the diffuser assembly.
  2. Use supports that resist rotation caused by the diffuser weight.
  3. Level and lock the duct before cutting the opening.

Make the connection

  1. 1

    Verify the layout from below and mark the final opening.

  2. 2

    Cut accurately while supporting the cookie so it cannot fall into the duct.

  3. 3

    Deburr and clean the opening.

  4. 4

    Set the factory saddle or boot square to the duct and room axis.

  5. 5

    Mechanically fasten the connection evenly.

  6. 6

    Seal internally or neatly as the approved detail requires.

  7. 7

    Install the diffuser and recheck level, alignment, and duct rotation.

Check the install

  • The diffuser line is straight and aligned with the room.
  • The opening is clean and does not damage the spiral seam.
  • The duct remains round and does not roll.
  • The saddle or boot is fully seated, fastened, and sealed.
  • No debris or cookie remains inside the duct.

Common mistakes

  • Cutting before checking the view from the room below.
  • Allowing the cookie to fall into the duct.
  • Locating the opening across the spiral seam or too close to a hanger.
  • Installing the diffuser before the duct is braced against rotation.

Stop and ask

Stop if the opening weakens the seam, conflicts with a hanger or joint, the diffuser line is not coordinated, or the duct cannot be supported against rotation.