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‘B’ Plane Offset (CFO)

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  • Last UpdatedMay 20, 2026
  • 2 minute read

The task of creating an HVAC Component is initiated from the HVAC Window.

  1. Select Flat Oval in the Categories drop-down list and then ‘B’ plane Offset in the Available Type drop-down list to display the miterd B Offset window:

  2. You are required to input the following dimensions:

    • Duct Width AA

    • Duct Depth AB

    • Length

    • Offset

    • Arrive CL Throat

    • Leave CL Throat

    • Male Collar (A)

    • Male Collar (L)

  3. To visualize how the dimensions equate to the actual piece of HVAC, click Picture to display a detailed drawing for ‘B’ Plane Mitred Offset (CAFO).

    Note: The fields will be pre-populated with default dimension. These dimension are governed by the details defined in the HVAC Catalogue.

  4. Click Transpose Width/Depth to exchange Duct Width AA dimension with Duct Depth AB dimension.

  5. Specify a type of joint to use for the Arrive Joint and Leave Joint). Refer to Create/Modify HVAC Component for a detailed description.

  6. After selecting the type of joint to use for the Arrive Joint and Leave Joint you must enter the Offset Direction.

  7. In the Offset Direction enter the direction for the Offset relative to the Point of Origin. Valid directions are (East), N (North), U (Up), -E (negative East), -N (negative North) or -U (Negative Up).X, Y, Z, -X, -Y or -Z.

  8. In the Position list, select Connect or Unchanged:

    • Click Connect (default when create is selected) - connects the piece of HVAC to the previous one.

    • Click Unchanged (default when modify is selected) - positions the component at the co-ordinates 0.00.

      Note: Unchanged is usually used, when Modify is selected, it does not connect the component but positions it at 0.00, in effect in a floating position.

  9. Click Defaults to reset all the fields back to when the miterd B Offset window was opened.

  10. Click Fit to orientate the miterd B Offset to automatically match the outlet (p-leave) of the previous piece of HVAC to the inlet (p-arrive) of the next piece.

  11. Click OK to create the miterd B Offset component and close the miterd B Offset Window. You will be returned to the HVAC Window.

  12. Click Cancel to discard all field changes and close the miterd B Offset window.