Ashrae Duct Fitting Database Version. 6.00.05 Jun 2026

The database provides engineers with a standardized method to calculate dynamic losses in air distribution systems, replacing outdated printed tables with a searchable, programmable interface. Version numbers (like 6.00.05) track incremental updates to fitting geometries, test data, and software corrections.

| Problem | Solution | |--------|---------| | The database returns a "Division by zero" error for very low velocity. | Version 6.00.05 sets a minimum velocity floor of 150 fpm to avoid exaggerated C₀ correlations. Adjust your system minimum. | | My fitting isn’t listed (e.g., custom 37.5° lateral). | Use interpolation between 30° and 45° fittings. Version 6.00.05 includes interpolation guidance in the user manual. | | Loss coefficient seems too low for a transition. | Check the reference velocity. Transitions often use V₂ (smaller side), giving lower C₀ but higher Pv. | | Can’t open .mdb on macOS. | Use a third-party ODBC driver (e.g., ActualTech) or convert to SQLite using a Windows VM. | ashrae duct fitting database version. 6.00.05

: The ASHRAE Duct Fitting Database is frequently integrated into HVAC design software like Autodesk Revit to automate pressure loss calculations across entire duct systems. Duct Fitting Database - ASHRAE The database provides engineers with a standardized method

Over 200 round, rectangular, and flat oval fittings categorized by function: supply, exhaust, and common (supply/return). Real-Time Calculations: | Version 6

: For technical specifics regarding version 6.00.05, such as installation troubleshooting or viewing "Loss Coefficients (pdf)" from the help menu, refer to the official FAQ page . Database Features (v6.00.05)