Excel Link — Ashrae Duct Fitting Database

per path → fan sizing.

Efficiency dictates success in modern HVAC engineering. Designers, mechanical engineers, and estimators constantly seek ways to accelerate calculations without sacrificing accuracy.

FittingID,Type,Param1,Param2,Co 401,Elbow 90 r/D=1.0,,,0.21 401,Elbow 90 r/D=1.5,,,0.15 403,Mitered elbow,,,1.20 ashrae duct fitting database excel link

: Includes data for supply, exhaust, and common duct functions with pictorial outlines for easy identification.

The official ASHRAE Duct Fitting Database desktop application includes built-in export capabilities. Open the ASHRAE DFDB application. Select the specific fittings used in your project. Input the internal geometry and flow rates. per path → fan sizing

Create a data tab in your Excel file that maps the "Fitting Code" to its corresponding C-factor (often a function of radius ratio or velocity). Use =VLOOKUP or =INDEX(MATCH()) to bring these values into your main calculator. Key Benefits of Using the DFDB in Excel

For complex systems, integrating the ASHRAE formulas directly into your custom Excel design tool is an essential practice for modern HVAC professionals. FittingID,Type,Param1,Param2,Co 401,Elbow 90 r/D=1

Use INDEX-MATCH or XLOOKUP with multiple criteria.

| Feature | Description | | :--- | :--- | | | Over 200 round, rectangular, and flat oval fittings with pictorial outlines | | Unit Flexibility | Built-in conversion between I-P and SI units | | Project Management | Save fittings into project files (.dfdb) for easy storage and transfer | | Search Capability | Type partial or full fitting code names to quickly retrieve specific fittings | | Reporting | Generate and email reports with spreadsheet attachments for further analysis | | Custom Parameters | Change minimum and maximum allowable values for all input parameters | | Data Export | Generate CSV or XML outputs for Excel, Revit, or other analysis tools | | Mobile Access | Free DFDB Lite app for iOS devices for field calculations |

Write a Visual Basic for Applications (VBA) macro that interpolates between the non-linear points of the ASHRAE tables. Since air velocity and aspect ratios rarely land exactly on a whole number indexed in the table, a linear interpolation script ensures precise calculations.