Where:
The ASHRAE Handbook—Fundamentals is updated every four years. The 2016 timeframe is significant because it followed the major updates seen in the 2013 Handbook and preceded the refinements in the 2021 edition. The 2016 database became the industry standard for several years, codified within the ASHRAE Handbook—Fundamentals (2017 edition, which carried over the 2013/2016 data sets).
The includes over 200 unique fitting types, covering round, rectangular, and flat oval ductwork geometries.
: The interface allows for inputs (like flow rate and dimensions) that update pressure loss and loss coefficient results instantly.
Overestimating pressure drop leads to "over-motoring," while underestimating it leads to poor climate control.
Where:
Featuring pictorial outlines of each fitting, this database is useful to design engineers dealing with a variety of duct fittings. Duct Fitting Database Lite App - ASHRAE
This software allowed engineers to input their specific parameters: