Ashrae Duct Fitting Database Version. 6.00.05 Online

This article explores everything you need to know about ASHRAE Duct Fitting Database Version 6.00.05: its features, technical improvements, how to use it, and why it remains the gold standard for HVAC system modeling. Before diving into Version 6.00.05 specifically, it is important to understand the tool's purpose. The ASHRAE Duct Fitting Database is a digital repository of loss coefficients (C-values) for over 1,000 types of duct fittings. It accompanies ASHRAE’s "Duct Fitting Database" (DFDB) CD/DVD and is referenced directly in the ASHRAE Handbook—Fundamentals , Chapter 34 (Duct Design).

The answer depends on your work. Here are compelling reasons to move to Version 6.00.05: ashrae duct fitting database version. 6.00.05

Last updated: September 2025 – verified against ASHRAE’s official release notes. This article explores everything you need to know

| Feature | Version 5.x | Version 6.00.05 | |--------|-------------|------------------| | 64-bit support | No (runs on 32-bit emulation) | Yes | | Reynolds correction accuracy | ±10% for some fittings | ±5% (peer-validated) | | Number of fittings | ~850 | ~1,100 | | Export to EnergyPlus | Manual CSV edit | Direct formatted export | | Revit plugin | Third-party only | Native COM interface | | Feature | Version 5