: It is typically distributed on CD-ROM but is also available as a digital download through the ASHRAE Web Version for subscribers.
Version 6.0 directly supports:
When air moves through a duct system, it encounters friction and turbulence. While calculating friction in straight ducts is relatively straightforward using a Darcy-Weisbach or Colebrook equation calculator, determining the pressure loss at joints, turns, and transitions is far more complex. This is where the "fitting loss coefficient" ($C$) comes in. Ashrae Duct Fitting Database Version 6.0 Free Download
Previous versions had gaps in the Reynolds number range. Version 6.0 smooths out the interpolation between laminar and turbulent flow regimes, giving you accurate C-values even for low-flow or variable-air-volume (VAV) systems. : It is typically distributed on CD-ROM but