Show Gaps
- Last UpdatedJan 07, 2026
- 2 minute read
Each gap between the pieces of HVAC and/or equipment in the selected branch is identified and the optimum combination of standard and non-standard ducting straights required to fill each gap is calculated.
The gaps shown in the 3D graphical view are dependent upon if a branch, a piece of HVAC or a piece of equipment is selected in the Design Explorer, identified as the CE. If a branch is selected, all gaps in the branch will be shown. If a single piece of HVAC or equipment is selected, only the gap between the selected piece and the next piece is shown.
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To identify each gap and calculate the required fixed length of ducting straight to fill it, select Utilities > Autofill with Straights > Show Gaps from the main menu to display the Highlight Implied Ductwork. (HVAC) window.

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After selecting the required pieces of HVAC in the Design Explorer, select Apply.
The Highlight Implied Ductwork. (HVAC) window displays the:
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Location, the preceding component.
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Length.
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Calculated fixed lengths of standard and non-standard ducting straights to fill the gaps.
All corresponding lengths of implied ducting are highlighted red in the 3D Graphical View.
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Selecting Unhighlight removes all the red highlighting from the 3D Graphical View.
Note: The red highlight is also removed from the 3D graphical view, once the Highlight Implied Ductwork. (HVAC) window is dismissed.
