Ashrae Duct Fitting Database Version. 6.00.05 -

The database stores native values in dimensionless coefficients, but the accompanying documentation provides coefficient formulae for both I-P (inches, cfm, in.wg) and SI (mm, m³/s, Pa). Version 6.00.05 improves the conversion rounding to avoid cascading errors in international projects.

The ASHRAE Duct Fitting Database (DFDB) Version 6.00.05 remains the industry gold standard for calculating pressure losses in HVAC duct systems. While the user interface retains a legacy "database" feel, the underlying calculation engine is indispensable for engineers performing detailed load calculations, CFD model validation, or commissioning analysis. This version provides critical updates to the ASHRAE Handbook data, making it a necessary upgrade for professionals relying on precision over "rules of thumb." ashrae duct fitting database version. 6.00.05

When pursuing LEED credits for optimized energy performance, you must demonstrate that duct static pressure is modeled accurately. Using outdated or generic loss coefficients (e.g., assuming C=0.22 for all elbows) can overestimate fan energy by 15-20%. Version 6.00.05 allows you to match exact geometry, improving energy prediction. The ASHRAE Duct Fitting Database (DFDB) Version 6

Export branch loss coefficients into a .CSV format from DFDB v6.00.05 and import via the "Fitting Library" editor. This ensures your energy model reflects actual dynamic losses, not arbitrary defaults (like 100% of velocity pressure). When pursuing LEED credits for optimized energy performance,

Unlike older versions that required 32-bit Windows or legacy database drivers, Version 6.00.05 is fully compatible with: