The ASHRAE Duct Fitting Database Lite is a free app for iOS that allows for quick field calculations for common fittings.
The primary tool for current data, accessible via an annual subscription on the ASHRAE Bookstore .
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Because the equations used to calculate fitting losses are public knowledge (published in the Handbook), many senior engineers and consultants build their own . ashrae duct fitting database excel link
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While the standalone ASHRAE Duct Fitting Database (DFDB) desktop application is a staple in the industry, integrating this data directly into Microsoft Excel transforms how engineers approach calculations. Linking ASHRAE duct fitting data with Excel automates workflows, reduces manual entry errors, and accelerates the design of complex commercial HVAC systems. Understanding the ASHRAE Duct Fitting Database (DFDB) The ASHRAE Duct Fitting Database Lite is a
The ASHRAE DFDB Lite App and the full iOS version allow users to generate reports. These reports often include a that can be emailed and opened on a desktop, providing a raw data link for further analysis. 3. Third-Party Excel Calculators
No database contains every unique architectural fitting. Create a clear protocol in your spreadsheet for overriding or manually inputting custom loss coefficients (e.g., manufacturer-certified proprietary dampers or fire dampers) without breaking the automated ASHRAE link chains. Maximizing Fan Efficiency Through Accurate Data
The feature automates this. It functions as a massive library of custom functions that feed directly into your spreadsheets. Instead of hard-coding a coefficient, you reference the ASHRAE function, and it pulls the dynamic data based on your specific fitting geometry. Because the equations used to calculate fitting losses
Input the geometric and air velocity data for each fitting into the ASHRAE DFDB software. The software will calculate the Cocap C sub o Step 3: Link Data to Excel Cocap C sub o
Are you still manually hunting for duct loss coefficients? The ASHRAE Duct Fitting Database (DFDB) is the industry gold standard for a reason. Why use it? Precision: 200+ round, rectangular, and flat oval fittings.
Select Get Data > From Database and point to your centralized fitting repository.
If you’ve ever spent hours manually calculating pressure drops through elbows, transitions, or tees, you know the pain. We all rely on the (Chapter 34, to be precise) for those loss coefficients. But flipping through pages or scanning PDFs is tedious.