There is to the ASHRAE Duct Fitting Database. But with a CSV export from your design tool or a Power Query connection to the new ASHRAE API, you can get the same result—a smart, living Excel workbook that calculates accurate duct fitting losses.
The full database is copyrighted by ASHRAE. You will not find a legitimate, permanent "free Excel download link" on a public website. However, ASHRAE provides licensed access to the data, and several legitimate pathways allow you to bring it into Excel. ashrae duct fitting database excel link
| Column A | Column B | Column C | Column D | Column E | | :--- | :--- | :--- | :--- | :--- | | Fitting ID | Description | Shape (Rnd/Rect) | Parameter 1 (R/D) | C_o | | EL-01 | Smooth Elbow 90° | Round | 1.5 | 0.15 | | EL-02 | Smooth Elbow 45° | Round | 1.5 | 0.08 | There is to the ASHRAE Duct Fitting Database
Enter flow rate and dimensions; get pressure loss instantly. Reliability: Data pulled straight from ASHRAE Handbook—Fundamentals. You will not find a legitimate, permanent "free