The is a comprehensive digital repository of loss coefficients for HVAC duct fittings, based on the extensively referenced ASHRAE Handbook—Fundamentals and the ASHRAE Duct Fitting Database CD originally developed in the 1990s. The 2016 edition represents a significant update, aligning with revised testing methods, modern manufacturing practices, and improved computational tools for system designers.
The 2016 release introduced several specific updates and maintained core functionalities essential for engineering accuracy: New Fitting Additions ashrae duct fitting database 2016
: A "Lite" version of the app is available for free on the Apple App Store for field use. The is a comprehensive digital repository of loss
: A free version providing a subset of the 240+ fittings for quick field checks. : A free version providing a subset of
) for specific fittings. This value represents the dynamic pressure loss caused by turbulence as air moves through turns, transitions, or obstructions.
Note: ASHRAE released a cloud-based API for the database in 2018, but the core 2016 dataset remains the reference standard for most BIM and Revit families.