Transformation Components - Linear Plenum
- Last UpdatedJan 27, 2026
- 2 minute read
The task of creating an HVAC Component is initiated from the HVAC Window.
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Select Transformations in the Categories dropdown list and then Linear Plenum in the Available Type dropdown list to display the Linear Plenum window:

You are required to input the following dimensions:
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Duct Diameter
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duct width LA
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duct depth LB
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Rect Box Height
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Height cl Circ
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A offset
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Circ Extension
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Male Collar
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To visualize how the dimensions equate to the actual piece of HVAC, select Picture to display a detailed drawing for Transformations Components Catalog Elements - Circular to Linear Plenum.
Note: The fields will be pre-populated with default dimension. These dimension are governed by the details defined in the HVAC Catalog.
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Select Transpose width/depth to exchange duct width LA dimension with duct width LB dimension.
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Specify a type of joint to use for the Circ Jnt (Circular Joint) and Rect Jnt (Rectangular Joint). For more information, see Create / Modify HVAC Components.
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After selecting the type of joint to use for the Circ Jnt and Rect Jnt, you must enter the Leave Direction.
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In Leave Direction specify the Axis that should be used. Valid Axis 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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Using the Flip? - Rect > Circ dropdown list, you can choose whether to flip the direction of arrive and leave of the of the piece of HVAC, 180° relative to the point of origin.
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In the Connect list, select Connect or Unchanged:
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Select Connect (default when Create is selected) - connects the piece of HVAC to the previous one.
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Select Unchanged (default when Modify is selected) - positions the piece of HVAC at the co-ordinates 0.00.
Note: Unchanged is usually used, when Modify is selected, it does not connect the piece of HVAC but positions it at 0.00, in effect in a floating position.
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Select Defaults to reset all the fields back to when the Linear Plenum window was opened.
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Select Fit to orientate the Linear Plenum 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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Select OK to create the Linear Plenum component and close the Linear Plenum Window. You will be returned to the HVAC Window.
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Select Cancel to discard all field changes and close the Linear Plenum window.