: Older or unofficial versions often fail to work with modern BIM tools like Autodesk Revit
While "patched" often refers to unofficial modifications in software, ASHRAE officially updates the database (currently version 6.0) to maintain compatibility with modern operating systems and design standards. ashrae duct fitting database pdf patched
: The Loren Cook Company offers a free engineering PDF that includes some common fitting loss coefficients as a secondary reference. Performance & Use Cases Ashrae Duct Fitting Database Software - CLaME : Older or unofficial versions often fail to