The ASHRAE Duct Fitting Database (DFDB) is a comprehensive digital library used by HVAC engineers to calculate pressure losses across more than 200 types of round, rectangular, and flat oval fittings. While the core database is provided as a or a mobile app, many professionals integrate this data into Excel spreadsheets to perform the total External Static Pressure (ESP) calculations required for sizing fans and air handling equipment. Key Features and Access Duct Fitting Database - ASHRAE
ASHRAE does not provide a direct version of the entire Duct Fitting Database (DFDB) . Instead, the official tool is a cloud-based application available by annual subscription, which contains loss coefficient tables for over 200 fitting types. How to use ASHRAE data in Excel ashrae duct fitting database excel
: Select the longest duct route or the one with the most fittings to determine the maximum pressure drop. Tag Components The ASHRAE Duct Fitting Database (DFDB) is a
💡 The "Lite" version is a great starting point for basic field calculations. Instead, the official tool is a cloud-based application