-factors for specific fitting geometries based on experimental data and fluid dynamics research.
You can buy individual or enterprise licenses directly from the official ASHRAE Bookstore.
Once installed, open the database. Go to . Ensure you select IP (Inch-Pound) or SI based on your project.
You can now export fitting data directly as CSV, XML, or JSON—making it easier to integrate with cloud-based BIM platforms like Autodesk Revit and Trimble SysQue.
If you do not need the automated software interface, you can find the raw loss coefficient tables in the printed or digital editions of the (Chapter 21 or the relevant Duct Design chapters).
The primary utility of the DFDB lies in its capability to streamline fluid dynamics calculations without requiring complex Computational Fluid Dynamics (CFD) simulations for standard layouts. Loss Coefficients ( Cocap C sub o