This section describes the options available in the Default Fittings group in the Design Master HVAC Options dialog box.

Rectangular elbow: The default fitting used for elbows in rectangular ducts.
• | Square elbow: A Square Elbow fitting is used. See Turning Vanes on Square Elbows and Wyes in the Fittings options section for whether the elbow includes turning vanes. |
• | Radius elbow: A Radius Elbow fitting is used. See Radius for Elbows in the Fittings options section for the radius used for the elbows. |
Rectangular branch: The default fitting used for a single takeoff in a rectangular duct.
Rectangular cross: The default fitting used for a cross in a rectangular duct.
Round elbow: The default fitting used for elbows in round and flat oval ducts.
• | Square elbow: A Square Elbow fitting is used. See Turning Vanes on Square Elbows and Wyes in the Fittings options section for whether the elbow includes turning vanes. |
• | Radius elbow: A Radius Elbow fitting is used. See Radius for Elbows in the Fittings options section for the radius used for the elbows. |
Round branch: The default fitting used for a single takeoff in a round or flat oval duct.
Round cross: The default fitting used for a cross in a round or flat oval duct.
Transparent Ducts: The fitting inserted in the previous duct before a transparent duct. See the Previous and Next Ducts section for information about determining which duct is the previous duct.
• | End Cap: An End Cap fitting is inserted at the end of the previous duct. |
• | None: No fitting is inserted at the end of the previous duct. |
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