The ASHRAE Duct Fitting Database is a digital library of loss coefficients for over 2,000 duct fittings. It is the digital companion to the ASHRAE Handbook of Fundamentals and the HVAC Duct Construction Standards . Each fitting includes detailed geometry, loss coefficients (C values), and reference velocity pressures.
The printed and digital editions of this handbook contain extensive chapters dedicated to duct design, complete with tables of loss coefficients for the most common fittings.
Imagine an HVAC engineer named Elias working on a high-stakes commercial project. He needs to size a fan for a complex duct system to ensure energy efficiency and meet strict building codes. The ASHRAE Duct Fitting Database is a digital
Input specific dimensions, aspect ratios, angles, and flow ratios to find the exact matching coefficient.
Beware of sites offering the "full install" for free, as these may violate copyright or contain malware. It is always recommended to obtain software through authorized channels to ensure accuracy and security. How to Install the ASHRAE Duct Fitting Database 6.0 The printed and digital editions of this handbook
More robust and stable database structure.
For HVAC engineers and designers, the is the industry-standard software for calculating pressure losses in duct systems. It provides comprehensive loss coefficient tables for over 200 round, rectangular, and flat oval duct fittings. Is There a Free Full Install of Version 6.0? Input specific dimensions, aspect ratios, angles, and flow
This guide assumes you have a legal right to use DFDB v60, either through membership, institutional access, or legacy purchase. If you have no legal access, consider using the ASHRAE DFDB Online (subscription required) or open-source alternatives like OpenDuct or Python duct fitting libraries .