Ashrae Duct Fitting Database Version. 6.00.05 _top_ Jun 2026

[User Input: Flow, Shape, Dimensions] │ ▼ [ASHRAE DFDB v6.00.05 Engine] ──► [Computes Reynolds No. & Area Ratios] │ ▼ [Calculates Loss Coefficient (Co) & Velocity Pressure (Pv)] │ ▼ [Output: Exact Fitting Pressure Drop (ΔP)] Technical Specifications and Software Architecture

Code officials and project peer-reviewers can easily cross-reference design documents when a standardized software version is cited. Conclusion

The interface now updates all calculations instantly as you type, rather than requiring a manual "calculate" click. For field use, you can also look into the Duct Fitting Database Lite App ashrae duct fitting database version. 6.00.05

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: Enter dimensions such as width, height, diameter, radius ratio, or upstream/downstream angles. [User Input: Flow, Shape, Dimensions] │ ▼ [ASHRAE

Identify the exact fitting configuration using standard ASHRAE designations (such as ED5-1 for a specific type of elbow or SD5-3 for a screened tee junction). 3. Input Geometrical & Flow Data Enter your physical design parameters: Duct height, width, or diameter Turning radii or transition angles Airflow volume (CFM or L/s) Upstream or downstream velocities 4. Analyze and Export Click calculate to generate the precise loss coefficient ( Cocap C sub o

One common source of error is using the wrong velocity pressure (upstream vs. downstream). Version 6.00.05 explicitly labels whether the loss coefficient is based on: For field use, you can also look into

The database is built upon decades of rigorous research published in the ASHRAE Handbook—Fundamentals, and its coefficients are derived from laboratory testing conducted in accordance with (Method of Testing to Determine Flow Resistance of HVAC Ducts and Fittings). The version 6.00.05 release represents the culmination of this authoritative lineage, delivered through a modern, cloud‑based interface.

Using the wrong database version can result in pressure drops being off by 200-300%, leading to oversized fans, wasted energy, and high utility bills. If you are using a version earlier than 6.00.xx, you are working with pre-2021 data.

The current version of the database is 6.00.05, which was released to provide updated and expanded data on duct fittings. This version includes: