How to Draw Flexible Duct Segments Using New Features in Revit 2019
Start by opening the view of the duct system where you want to add a flexible duct.
Navigate to the System tab, then find the HVAC panel and select the Flexible Air Duct tool.
Note: You can also right-click on the duct endpoint connector and choose Draw a Flexible Air Duct from the options. For more details, please refer to the section on connecting flexible ducts to existing duct systems.
Some components have multiple connectors stacked vertically. When drawing flexible ducts on these stacked connectors, a Select Connector dialog box will appear, allowing you to specify which connector to use.
Use the Type Selector to choose the air duct type that matches the pipe network you want to connect the new duct to.
On the ribbon, select your preferred placement option.
Then, on the Options Bar, specify your layout preferences and click Apply.
Make sure the option Mark During Placement is enabled on the ribbon to automatically label ducts as you place them. You can adjust tag options directly on the options bar.
In the drawing area, click to set the starting point for the flexible duct.
When connecting to existing ducts, click on connectors attached to mechanical equipment or air terminals, or click on the centerline of an existing duct network to define the start or end point of the duct.
Again, if you encounter stacked connectors, the Select Connector dialog will appear to help you choose the correct connector.
Drag the duct preview’s endpoint along the desired path for the flexible duct.
Click at each point where the duct should bend.
To adjust the shape of the flexible duct, click on the bend positions to place vertices. These vertices can be used to reshape the duct. Additionally, you can insert or delete vertices through the flexible duct’s context menu options.
Finally, click on the connector at the air duct end, duct segment, or mechanical equipment to specify the flexible duct’s endpoint.
Transition pieces and T-shaped tees will be automatically added to the duct system to facilitate the connection of flexible ducts.
Circular duct elements (both rigid and flexible) are displayed with centerlines in hidden line views. For duct fittings, you can customize the default centerline by editing the family, adding model lines, and assigning their subcategories as centerlines.
Note that elliptical and rectangular duct elements do not display centerlines in hidden line views.
By default, centerlines are disabled in American templates.
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