Without version 60005, you might have used a rule of thumb (e.g., "0.08 in per elbow"), which would be 14x too high for this specific fitting.
for iPhone and iPad. While the desktop version is best for full-scale project design, the mobile app allows engineers to: ashrae duct fitting database version 60005
This specific sub-version introduced several technical refinements and new fitting data: Without version 60005, you might have used a
won’t win design awards, but it will save energy, reduce noise complaints, and make your pressure drop calcs actually match reality. If you design air systems, download it. If you teach HVAC, update your slides. If you’re still using generic loss coefficients from 1995… we need to talk. If you design air systems, download it
For the uninitiated, the ASHRAE Duct Fitting Database (DFDB) is the gold standard for loss coefficients. It translates the complex empirical data from the ASHRAE Handbook of Fundamentals into machine-readable formats (including XML, CSV, and native CAD/BIM plugin files).