Ashrae Duct Fitting Database Excel Link //top\\ Jun 2026

[ \Delta P = C_o \times \left( \frac\rho V^22 \right) ] In Excel: =Co * (0.075 * Vel^2 / 2) (for standard air)

The ASHRAE Duct Fitting Database (DFDB) is a digital repository of loss coefficients ( C₀ or Co ) for thousands of duct fittings (elbows, tees, transitions, etc.), based on ASHRAE Fundamentals Handbook, Chapter 34 (or 35 in some editions). The official version is distributed as a Windows DLL (Dynamic Link Library) or as part of commercial HVAC software. ashrae duct fitting database excel link

in Excel:

After installation, look for a file named FittingDB.mdb (Microsoft Access) or ASHRAE_Fittings.dat . [ \Delta P = C_o \times \left( \frac\rho