Author: Bradley Cooley Revit MEP, Revit

The Pressure Drop Calculation Methods are updated in Revit MEP 2015 with further options built in to the pull down menu. Previous versions only came with one calculation option available or required a 3rd party add-in to change methods.

Several of the more common or useful friction factor formulas have been added to the dropdown. These include the Altshul-Tsal, Colebrook and Halland Equations for Duct and variations for Pipe. The ability to use a different Calculation Method can improve accuracy in the model.

The new pull down menu is accessed through the Mechanical Settings in the Manage Tab for both Duct and Piping Calculations. Selecting the Calculation Method in either Duct or Pipe will show the drop down menu and supporting formula below.


Check out the video Revit MEP 2015: Pressure Drop Calculations

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      Bradley Cooley
Bradley Cooley
AEC Application Specialist

Bradley earned his Bachelor of Architecture degree from the University of Oregon, Portland. His special research and design emphasis was on commercial production facilities including wineries, breweries, and distilleries. Bradley’s professional experience has a design focus on build services for residential construction and environmental graphics. Within his community, he volunteers as a youth athletics coach. As Ideate’s Services Manager and a Revit Instructor, Bradley provides Revit MEP training and support for AEC firms. He is based in the Ideate Portland, Oregon office.