By inputting geometric dimensions, air density, and volumetric flow rate ( CFMcap C cap F cap M

The database eliminates the need for engineers to manually interpolate massive, complex charts found in physical handbooks by automating fluid dynamic equations.

This database is the industry standard for calculating pressure loss (dynamic loss) through duct fittings in HVAC systems. The 2016 update was significant, introducing new fittings, correcting legacy data, and integrating with modern design software.

that a fan must overcome to move conditioned air through a building. Duct Fitting Database - ASHRAE

Summary