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September 12, 2011


I have leveraged both features to convey static pressure calcs are performed in RME. However, the engineer is questioning numbers. How does RME calculate static pressure.

Hi Bill-- there is a detailed example here http://wikihelp.autodesk.com/Revit/enu/2013/Help/00001-Revit_He0/3251-Referenc3251/3276-Hydronic3276/3280-Pressure3280 for pipe, and a detailed example for duct here http://wikihelp.autodesk.com/Revit/enu/2013/Help/00001-Revit_He0/3251-Referenc3251/3259-Duct_Siz3259/3260-Duct_Siz3260/3262-Pressure3262

Additionally, in 2013, there is a pressure loss report tool for duct and pipe that provides a complete breakdown of where all the numbers come from... similar to why you'd find in the ASHRAE Handbook Fundamentals 2009 starting on page 21.22

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