Autodesk 235B1-05A761-1301 User Guide - Page 223

If you want to... then... specify a maximum height for rectan- select Rectangular/Oval Max. Height and enter a value. gular or oval ducts specify which duct sizes to use from the duct catalog select All, 1 inch increment, or Even sizes only. apply duct size calculations to any objects in the system that already have a defined shape select Apply sizing to parts with defined shape. 6 Click Start. 7 When the calculations are complete, the system is resized in the drawing. The example drawing converted to a sized 2-line duct system. If any errors occurred during calculations, click View Event Log to see a description of the error. Note that duct segments are not broken into multiple segments. The calculated duct size is applied to the entire duct segment. For example, you may want to reduce the duct size at all points where the system services 2 air diffusers. To refine your system, you can break a duct into segments and recalculate sizes. For more information on breaking duct, see Breaking or Merging Duct on page 234. Adding a Duct Fitting Manually Typically, AutoCAD MEP adds fittings as you draw a duct run based on the default fittings specified in the duct layout preferences. However, you can also add them manually. You can add a fitting to an existing segment or run. You can also add a fitting from which to start a segment or run, or to customize the connection to a part. You manually add duct fittings using the tools on the Fitting tool palette in the HVAC tool palette group. You select a tool, use the Add Duct Fittings dialog to select the fitting and configure its properties, and then add the fitting to the drawing. To manually add a duct fitting 1 In the HVAC workspace, do one of the following: ■ Click Home tab ➤ Build panel ➤ Duct Fitting drop-down ➤ Duct Fitting . ■ Open the Fitting tool palette, and select a fitting tool. If necessary, scroll to display the tool. Adding Duct | 205