The friction of the section.
Namespace:
Autodesk.Revit.DB.Mechanical
Assembly:
RevitAPI
(in RevitAPI.dll) Version: 21.0.0.0 (21.1.1.109)
Since:
2013
Syntax
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Remarks
In one section, all section members have same friction.
Default unit is Feet of Water (60 °F) per 100 feet.
For Duct, unit type is UT_HVAC_Friction.
For Pipe, unit type is UT_Piping_Friction