The serves as the global standard for mechanical engineering professionals calculating pressure losses in commercial and residential ventilation systems. Developed through a collaboration between ASHRAE Technical Committee 5.2 (Duct Design) and Carmel Software Corporation, this specialized software streamlines the computation of fluid dynamics within duct networks. By providing an expansive database of reliable aerodynamic data, version 6.00.05 eliminates guessing from External Static Pressure (ESP) calculations, preventing the under-sizing or wasteful over-sizing of commercial fans, Air Handling Units (AHUs), and Fan Coil Units (FCUs). Core Purpose and Engineering Value
elbow with a specific radius-to-diameter ratio) and obtain the precise Cocap C sub o value, rather than relying on estimates. Conclusion
Perhaps the most valuable contribution of the DFD Version 6.0.005 is its role in predicting the .
: It contains loss coefficient tables for over 200 types of fittings, including round, rectangular, and flat oval designs. ashrae duct fitting database version 60005
The ASHRAE Duct Fitting Database , through its comprehensive tables, allows users to calculate the total pressure loss ( ) for a fitting using the equation: Δpt=Co×pvdelta p sub t equals cap C sub o cross p sub v is the pressure loss of the fitting. Cocap C sub o is the loss coefficient from the ASHRAE Database. is the velocity pressure in the duct.
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Version 6 introduces a redesigned, more efficient user experience. Key improvements include: The serves as the global standard for mechanical
: Allows users to enter flow rates and fitting dimensions to instantly obtain the loss coefficient ) and the resulting pressure loss cap delta cap P System Modes
200 types of round, rectangular, and flat oval duct fittings 🚀 Key Features of Version 6.00.05 Comprehensive Library
Before diving into the specifics of version 6.00.05, it's important to understand the foundation of the DFDB. For decades, ASHRAE has compiled extensive research on the pressure losses caused by various duct fittings such as elbows, transitions, tees, and wyes. This data, traditionally found in tables within the ASHRAE Handbook—Fundamentals, is the scientific basis for the DFDB. The database is a digital repository that includes loss coefficient tables for more than 200 round, rectangular, and flat oval duct fittings. It is designed to help engineers quickly and accurately calculate the pressure drop across any fitting, a critical step in designing efficient HVAC systems. Core Purpose and Engineering Value elbow with a
Professionals have two other complementary options:
Specific fixes to equations for fittings like ER2-2 and SD5-3 to align with the ASHRAE Handbook of Fundamentals. 5. Application in HVAC Design