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: ASHRAE also developed a "Lite" app for iOS to bring these calculations to the field, designed by Carmel Software Corporation. The "Pain Point": Revit Integration
The ASHRAE Duct Fitting Database is a software tool that contains a vast library of duct fitting configurations, including elbows, tees, wyes, and transitions, among others. The database provides engineers with the necessary data to calculate pressure losses in duct systems, which is essential for designing efficient and effective HVAC systems. The database includes a wide range of duct fitting configurations, including:
If you use AutoCAD MEP or Revit, the updated 60005 plugin fixes a persistent bug where dynamic pressure calculations would default incorrectly for metric (SI) workflows. The new version now passes the data model more cleanly, meaning fewer “Unknown Fitting” errors in your pressure drop reports.
Inaccurate pressure calculations can lead to noisy systems (high velocity) or insufficient airflow (high resistance). The database helps engineers balance,, ensuring the system operates quietly and provides comfort. How to Use the ASHRAE Duct Fitting Database Using the database is a straightforward process: ashrae duct fitting database version 60005
The "Loss Coefficients" table requires Adobe Acrobat Reader, as noted in the official FAQ .
Understanding the ASHRAE Duct Fitting Database (Version 6.00.05) ASHRAE Duct Fitting Database (DFDB)
: Users can save selected fittings into a project file, which is small enough to be easily transferred or emailed. Unit Flexibility : Supports both I-P (Inch-Pound) SI (International System) 🛠️ Updates in Version 6.00.05 : ASHRAE also developed a "Lite" app for
: Unlike its predecessors, version 6.00.05 is accessed via an annual cloud subscription , allowing for real-time updates and universal access.
This is the "interesting" part: The database acknowledges that the laws of physics change based on speed.
Provide a step-by-step example of calculating pressure drop for a (e.g., a rectangular pleat elbow)? The database includes a wide range of duct
When starting, it's helpful to explore a few key areas of the software:
Engineers can group selected fittings into specific project profiles. The software allows users to export these fitting schedules, along with their calculated loss coefficients, into Excel spreadsheets or text files for integration into broader external calculation sheets. Technical Breakdown: How to Use the Database
Stay tuned for our follow-up post: “How to Convert DFDB 60005 Data into Excel Pressure Drop Matrices.”
V=QAcap V equals the fraction with numerator cap Q and denominator cap A end-fraction = Velocity of the air = Volumetric flow rate = Cross-sectional area of the duct The velocity pressure ( Pvcap P sub v ) is then established:
This paper examines the structure, coefficients, and usage of the ASHRAE Duct Fitting Database (DFDB) version 60005. The DFDB provides loss coefficients ((C) or (C_o)) for hundreds of duct fittings based on laboratory testing, as documented in ASHRAE Research Project RP-1173. Version 60005 likely represents a specific data snapshot or update within the ASHRAE fitting library. We describe the database schema, coefficient extraction methods, comparison with earlier versions (e.g., 50004), and integration into energy simulation tools (e.g., EnergyPlus, Trane Duct Designer). Agreement with measured data is within ±15% for most fittings. Recommendations for quality assurance and version control are provided.