Input values such as height, width, and velocity to see immediate pressure loss updates.
For engineers looking to streamline their workflow, combining the DFDB with Excel-based analysis tools provides a powerful, flexible solution that leverages authoritative data within a familiar spreadsheet environment. By mastering the DFDB and its integration capabilities, HVAC professionals can ensure their designs meet performance requirements while minimizing energy waste and installation costs.
Official ASHRAE resources for the Duct Fitting Database (DFDB) are provided as standalone software or cloud-based subscriptions rather than a raw Excel file. However, you can use the software to generate data for your Excel sheets or find community-built Excel calculators that reference ASHRAE values. 🔗 Official ASHRAE Links Cloud-Based Database (Annual Subscription): Access the full database of over 200 fittings via the ASHRAE Bookstore Free Mobile App (Lite): Perform basic calculations on the go with the DFDB Lite App for iPhone and iPad. Service Life & Maintenance Database: A free tool for HVAC equipment planning is available on ASHRAE's Free Resources page 📥 Excel-Compatible Alternatives
This article is for informational purposes. Users should always refer to official ASHRAE documentation and licensing terms for the most current information. ASHRAE reserves all rights to its intellectual property, and unauthorized distribution or derivative works may violate ASHRAE policies. ashrae duct fitting database excel link
using VBA/Python link.
The primary tool for current data, accessible via an annual subscription on the ASHRAE Bookstore .
: Accessible via ductfitting.ashrae.org with an annual subscription. Input values such as height, width, and velocity
You can bridge the gap between ASHRAE's database and Excel using three primary methods. 1. Direct API and Commercial Add-ins
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.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Official ASHRAE resources for the Duct Fitting Database
: Supports both I-P (Imperial) and SI (International System) units. Workflow for ESP Calculation
For complex systems, integrating the ASHRAE formulas directly into your custom Excel design tool is an essential practice for modern HVAC professionals.
ratios for elbows). Ensure your Excel sheet uses conditional formatting to alert you if your design falls outside the tested ASHRAE data limits.
If you specifically need an Excel workflow, consider these options: Manual Export: Most engineers use the official DFDB software to find specific loss coefficients (
in Excel:
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