While the desktop and full cloud-based versions typically require a paid subscription or license, there are ways to access ASHRAE's data for free or at a lower cost: Duct Fitting Database - ASHRAE
The interface allows for immediate updates of output data as you adjust input parameters like flow rate and dimensions. ashrae duct fitting database version 60005 free
Users can save fittings into specific project files, making it easier to store and transfer data between team members. While the desktop and full cloud-based versions typically
The ASHRAE DFDB is a comprehensive digital repository of more than 200–250 round, rectangular, and flat oval duct fittings. It provides standardized, industry-validated data on: Loss Coefficients ( The ASHRAE Duct Fitting Database (DFDB) is the
): The dimensionless values used to calculate pressure drop.
Version 6.00.05 represents a stable and advanced iteration of the database, often accessed via cloud-based annual subscriptions. This version introduced several refinements to improve accuracy and usability:
Designing a high-performance HVAC system requires precision, especially when calculating the pressure losses that dictate fan selection and energy consumption. The ASHRAE Duct Fitting Database (DFDB) is the gold standard for these calculations, providing engineers with validated loss coefficient data. While the full software is a premium product, there are "free" entry points and lite versions that provide essential field capabilities. What is the ASHRAE Duct Fitting Database?