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v22gthe fraction with numerator v squared and denominator 2 g end-fraction ) is used in these calculations. ashrae duct fitting database version 60005
This paper examines the structure, coefficients, and usage of the ASHRAE Duct Fitting Database (DFDB) version 60005. The DFDB provides loss coefficients ((C) or (C_o)) for hundreds of duct fittings based on laboratory testing, as documented in ASHRAE Research Project RP-1173. Version 60005 likely represents a specific data snapshot or update within the ASHRAE fitting library. We describe the database schema, coefficient extraction methods, comparison with earlier versions (e.g., 50004), and integration into energy simulation tools (e.g., EnergyPlus, Trane Duct Designer). Agreement with measured data is within ±15% for most fittings. Recommendations for quality assurance and version control are provided. If you delete all of your shared links,