Ashrae Duct Fitting Database 2016 Jun 2026

Until AI-driven CFD becomes standard desktop technology, the 2016 database will continue to serve as the essential bridge between theoretical fluid dynamics and practical HVAC design.

The foundation of this effort was ASHRAE Standard 120—initially published in 1999, with the formalizing uniform laboratory test methods for determining flow resistance. This standard ensures that every fitting in the database was tested the same way, so engineers can trust that loss coefficients are comparable and consistent across all manufacturers. ashrae duct fitting database 2016