Taper (CC)
- Last UpdatedMay 20, 2026
- 2 minute read
The task of creating an HVAC Component is initiated from the HVAC Window.
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Select Circular in the Categories drop-down list and then Taper in the Available Type drop-down list to display the Circular Taper window:

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You are required to input the following dimensions:
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Duct Diameter ‘A’
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Duct Diameter ‘L’
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Length
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A Offset
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B Offset
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Arrive Extension
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Leave Extension
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Male Collar (A)
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Male Collar (L)
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To visualize how the dimensions equate to the actual piece of HVAC, click Picture to display a detailed drawing for Taper (CAC).
Note: The fields will be pre-populated with default dimensions. These dimensions are governed by the details defined in the HVAC Catalogue.The Arrive and Leave Extension default is auto but can be changed by you to a required dimension.
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Specify a type of joint to use for the Arrive Joint and Leave Joint. Refer to Create/Modify HVAC Component for a detailed description.
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After selecting the type of joint for the Arrive Joint and Leave Joint you must enter the A Offset Direction.
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In A Offset Direction enter the direction for the A Offset relative to the Point of Origin. Valid directions are E (East), N (North), U (Up), -E (negative East), -N (negative North) or -U (Negative Up). X, Y, Z, -X, -Y or -Z.
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In the Position list, select Connect or Unchanged:
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Click Connect (default when Create is selected) - connects the piece of HVAC to the previous one.
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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.
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Click Defaults to reset all the fields back to when the Circular Taper window was opened.
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Click Fit to orientate the Circular Taper component to automatically match the outlet (p-leave) of the previous piece of HVAC to the inlet (p-arrive) of the next piece.
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Click OK to create the Circular Taper component and close the Circular Taper Window. You will be returned to the HVAC Window.
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Click Cancel to discard all field changes and close the Circular Taper window.