Autodesk 235B1-05A761-1301 User Guide - Page 215
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1 In the HVAC workspace, do one of the following: ■ Click Home tab ➤ Build panel ➤ Duct drop-down ➤ Duct . ■ Open the Duct tool palette, and select a duct tool. 2 If you typically begin a design by defining the duct runs according to system, select a duct tool with a specific, predefined system, such as the Supply - Low Pressure tool. The duct that you draw inherits the system's properties, such as its design parameters, display properties, and rise and drop style. For more information, see Working with Systems on page 93. NOTE You can also begin drawing a duct run by clicking an Add grip on a part, duct fitting, or duct segment. Clicking the grip opens the Add Ducts dialog. 3 In the Add Ducts dialog, specify a system for System. 4 Specify a coordinate system and value for Elevation: If you want to... then... draw a run at a defined elevation select an elevation name for Elevation. draw a run at a specified elevation relative to a wall or other duct or duct enter the desired elevation, specify justification and offset, and use AutoCAD snaps or AutoCAD MEP snaps to specify points on the wall, duct, or other objects. start a branch at a specified elevation on a riser enter the desired elevation and use AutoCAD MEP snaps to specify a point on the riser. start a branch from a vertical run with a riser at a specified elevation enter the desired elevation and use AutoCAD MEP snaps to specify a point on the vertical run. extend a sloped duct or duct segment to a specified elevation enter the desired elevation, click Use Rise/Run, and use AutoCAD MEP snaps to specify the endpoint of a sloped duct or duct. If you lock the elevation, the elevation from the objects that you connect to is not inherited. 5 You can specify the offset in 2 directions: If you want to specify... then select... the horizontal offset Left, Right, or Center. Enter the horizontal distance of the run from the wall or other objects. the vertical offset Top, Center, or Bottom. Enter the vertical distance of the run from the ceiling or other objects. 6 Specify connection type, duct shape, and duct size. To calculate duct size using the instant sizing tool: If you want to... then... calculate size for round duct accept the detected value for Capacity, or enter a value for Capacity. Click . Adding Duct | 197
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