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Using the Duct Routing Tools Revit mep

Now that you have reviewed the process of using the duct routing tools, you will learn how to apply them in a simple exercise:
1. Open the Chapter10_Dataset.rvtfile found at www.sybex.com/go/
masteringrevitmep2012.
2. Open the floor plan view 1 – Mech, as shown in Figure 10.39. You will see that there are four air terminals (nonhosted) mounted at 8′-0″above level and a VAV unit mounted at 11′-0″. These have already been connected to a supply air system.

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3. Hover over any one of the air terminals, and press the Tab key. This highlights the system, as indicated in Figure 10.36. Left-click, and the Modify | Duct Systems tab is activated. Click the Generate Placeholder button.
4. Click the Settings button on the Options Bar, and check that the Duct conversion settings are as follows:
Main duct type: Rectangular Duct: Mitered Elbows/Tees •u
Offset 11 •u ′-0″
Branch duct: Rectangular Duct: Mitered Elbows/Tees •u Offset 11 •u ′-0″
Flexible duct: Flex Duct Round: Flex – Round with a maximum length of 6 •′-0″
5. Use Solution Type: Network, 1 of 6, and click the Finish Layout button. Activate the default {3D} view and notice that, as shown in Figure 10.40, the main run of duct is shown as a single line. If the flexible duct is also shown as a single line, this is not by design; it indicates that the flexible duct is not connected correctly and needs to be rectified.

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6. If the flex duct is too short to display properly, select one of the rectangular-to-round transitions and move it 2′-0″toward the center of the duct run. This will stretch both the placeholder duct and the flex duct, as shown in Figure 10.41. Repeat this process for each transition. You may find it easier to tile the open view windows and select the transition in the 3D view, but then actually move it in the plan view. Clicking the plan view should
retain the selection, but if you lose it, just right-click and choose Select Previous.

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7. The placeholder duct is ideal for concept and preliminary design in which little detail is required for your drawings. Once this stage is passed, you can change the placeholder ducts to actual ducts with fittings. To do this, simply select the placeholder ducts in the 3D view, either by selecting individually or selecting everything and using the Filter tool, as shown in Figure 10.42. Then click the Convert Placeholder button on the ribbon.

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8. With the duct in place, open the view Section 1. Here you can see there is a clash where you need to edit your duct to go under the beam. Using the Split tool, split the duct and delete the inner section and duct union fittings (or use the Split With Gap option), as shown in Figure 10.43.
9. Complete the duct as required to avoid conflict with the beam.

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