: Features pictorial outlines of each fitting, making it easier to select the correct component from the 200+ available options. Working with Excel Spreadsheets
The database includes table data for supply, exhaust, and common (supply/return) duct functions, and it features pictorial outlines of each fitting to aid in proper selection. Fittings can be saved into project files that are easily navigated and small enough to be stored and transferred. ashrae duct fitting database excel
For advanced teams, Excel can be supercharged using VBA (Visual Basic for Applications) or Python (via Excel's modern Python integration or openpyxl). By programming the interpolation math into custom VBA functions (e.g., =ASHRAE_COEFF("SD5-1", width, height, angle) ), you keep the calculation sheets tidy and eliminate massive, unreadable nested IF statements. Method C: Commercial Add-ins and Third-Party Templates : Features pictorial outlines of each fitting, making
Use VBA (Visual Basic for Applications) or modern Excel formulas ( XLOOKUP , INDEX , MATCH ) to auto-populate coefficients based on geometric inputs. For advanced teams, Excel can be supercharged using
Several third-party developers offer Excel add-ins pre-loaded with ASHRAE data, which populate fitting losses via custom Excel formulas.
To ensure your Excel sheet covers a standard commercial project, prioritize cataloging these common ASHRAE fitting families: Fitting Code Series Description Critical Variables for Excel Lookup Common Round Ducts Diameter, Reynolds number, surface roughness CD3 Series Round Elbows Bend angle, Radius-to-Diameter ratio ( SD3 Series Rectangular Elbows Turning vanes, Aspect ratio ( ), Smooth vs. mitered SD4 Series Rectangular Transitions Converging/diverging angles, length of transition SD5 / CD5 Series Tees and Junctions Branch-to-main flow ratio ( ), Area ratios Best Practices for Maintaining a Duct Fitting Workbook