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By using the ASHRAE Duct Fitting Database, you can: ashrae duct fitting database 2016
Note: ASHRAE released a cloud-based API for the database in 2018, but the core 2016 dataset remains the reference standard for most BIM and Revit families. Here is the accurate text reference for the
The database is organized into (Table 21-1 in ASHRAE Fundamentals). Examples: ashrae duct fitting database 2016