It includes data for supply, exhaust, and common (return) duct functions. Dynamic Calculations:
Unlike simple friction loss charts (which account for straight duct resistance), this database focuses on caused by:
Around 30 years ago, the industry reached a consensus: instead of each manufacturer bearing the huge cost of product testing, the industry would be best served by a common library of duct performance data that could be expanded as needed. ASHRAE's Technical Committee TC 5.2, "Duct Design," was tasked with producing this common resource. The result was the ASHRAE Duct Fitting Database, built on rigorous, standardized test data.
Although ASHRAE has moved on to the 2021+ online platform, the 2016 database is still available via: