The ASHRAE Duct Fitting Database with Excel Link is the definition of a "force multiplier." It does not replace the engineer's judgment—you still have to select the right fitting type—but it removes the arithmetic drudgery.
(Deducted 0.5 stars only for the occasionally clunky Excel Add-In setup process). ashrae duct fitting database excel link
Instead of manually reading complex logarithmic charts (like Chart 14-3 or 14-4 from the 1997 Handbook), the digital database allows engineers to compute dynamic losses instantly using standardized formulas: ( \Delta p = C_o \times P_v ) (where ( P_v ) is velocity pressure). The ASHRAE Duct Fitting Database with Excel Link
The electronic database has the capability to be linked to third-party duct design programs , which may then export results to Excel. 3. Alternative Resources Duct Fitting Database - ASHRAE The electronic database has the capability to be
If you cannot afford the official license or simply need a quick reference, use these alternatives. They are not the official ASHRAE database, but they replicate the coefficients from publicly available academic sources and older handbook editions (pre-2013).