Use analytical duct and pipe to analyze your designs as you model them..
This video demonstrates the following:
In Revit, duct and pipe elements incorporate an analytical segment within their definitions. When combined with schedules, analytical segments allow you to inspect and visualize pressure drop and flow data in design and fabrication networks, helping to facilitate the design of your building systems.
To select an analytical segment, begin with your project open in Revit. Hover the cursor over the desired element, and continue pressing TAB until Analytical Duct Segments appears in the status bar. In Properties, under Analytical Duct Segments, scroll to view parameters pertaining to flow and pressure loss, such as Critical Path and Pressure Drop, which are inherited from the primary element.
Analytical segments can be scheduled, filtered, and sorted based on parameters. In this example, click the open Analytical Duct Segment Schedule tab. In Properties, next to Filter, click Edit. The Schedule Properties dialog opens to the Filter tab. In this case, to display only the analytical elements included in the critical path of the system, expand the Filter by drop-down and select Critical Path. Adjust the third drop-down to Yes, then click OK. Notice that the schedule updates to include only Critical Path elements.
The analytical elements also carry a parameter value for Analytical Length. In such a schedule, you can include both Analytical Length and Pressure Drop and calculate the parameter totals. In Properties, next to Formatting, select Edit. The Schedule Properties dialog opens to the Formatting tab. Under Fields, select Pressure Drop, then expand the calculation drop-down and select Calculate totals. Do the same for Analytical Length, and then click OK. The totals now appear in the schedule. These values can assist in determining the sizes of system elements, such as fans or pumps.
Elements include critical sequence values to understand the position within the system and can be sorted using this parameter. In Properties, next to Sorting/Grouping, click Edit. In the Schedule Properties dialog, expand Sort by and select Critical Sequence, then click OK. In the schedule, the elements are now listed in order by critical sequence values.
To better visualize the analytical elements, you can hide the physical elements, leaving only the analytical segments. In Properties, next to Visibility/Graphics Overrides, click Edit. In the Visibility Graphics Overrides for 3D View dialog, in the Visibility column, deselect the physical elements that you want to hide, and then click OK. Please be aware that View filters for analytical segments are unsupported.
Next, to select a specific element in the system, use the schedule. Select a schedule row, and on the Modify Schedule/Quantities contextual tab, in the Element panel, click Highlight in Model. The chosen element is highlighted in the design.
Additionally, tags can be placed on elements within the system to create an isometric diagram that displays flow and pressure drops. On the Annotate tab, Tag panel, click Tag by Category. In the design, select an element to tag and then click to place the tag.
Analytical Duct and Pipe segments facilitate the creation of project documentation and help validate your designs, enhancing the design process and reducing the need for the system inspector.