Ashrae Duct Fitting Database Version. 6.00.05 [top] (ORIGINAL • 2025)

The ASHRAE Duct Fitting Database (DFDB) version 6.00.05 is a specialized software tool and reference set used by HVAC design engineers to calculate pressure losses in air distribution systems. Core Functionality

2. Expanded Fitting Library

Version 6.00.05 includes over 550 unique fitting configurations, up from approximately 450 in version 5.x. New additions include: ashrae duct fitting database version. 6.00.05

What’s Next? The Future Beyond Version 6.00.05

ASHRAE Technical Committee TC 5.2 (Duct Design) has announced that Version 6.00.05 will likely be the last standalone database release. Future iterations will be integrated directly into the ASHRAE Handbook Online and real-time design calculators. However, version 6.00.05 will remain the validated baseline for at least the next 5–7 years. The ASHRAE Duct Fitting Database (DFDB) version 6

Invest the time to learn its hierarchy, integrate it into your software stack, and always cross-check the reference velocity. In the high-stakes world of modern building design, guesswork is a liability—and Version 6.00.05 is your hedge against it. Bug Fixes & Stability: While ASHRAE typically does

• Bug Fixes & Stability: While ASHRAE typically does not publish a public changelog for minor point releases, version 6.00.05 primarily addresses database query errors and compatibility issues found in prior v6 builds.
• Library Integrity: Ensures that the loss coefficient tables for over 1,200 fitting types align perfectly with the 2021 ASHRAE Handbook—Fundamentals.
• Export Reliability: Improved export logic for CFD and energy modeling software (EnergyPlus, OpenStudio, Trace 3D, etc.).