The ASHRAE Duct Fitting Database (DFDB) is a software application that contains loss coefficient tables for more than 200 round, rectangular, and flat oval duct fittings, accompanied by pictorial outlines of each fitting configuration. For any given fitting, users can enter flow rate and fitting information to obtain loss coefficient data and associated pressure loss calculations—a capability essential for accurate HVAC system design.
The official database is typically delivered as: ashrae duct fitting database pdf patched
Over 200 different round, rectangular, and flat oval duct fittings. The ASHRAE Duct Fitting Database (DFDB) is a
