ASHRAE does not provide a single, free Excel file containing all raw data due to the complexity of the algorithms. However, there are three primary ways to link this data to Excel: 1. The Official ASHRAE DFDB Software

Use to filter out unnecessary fittings, keeping only the supply, return, and exhaust configurations relevant to your firm.

Place your imported ASHRAE data tables on hidden, protected sheets to prevent accidental edits by team members.

) for every elbow, tee, and transition is time-consuming and prone to errors. An automated link pulls data instantly based on fitting geometry.

The primary tool for current data, accessible via an annual subscription on the ASHRAE Bookstore .

For engineers seeking the underlying testing methodology, ASHRAE Standard 120-2017 establishes uniform methods for laboratory testing of HVAC ducts and fittings to determine their resistance to airflow. This standard supersedes ANSI/ASHRAE Standard 120-2008 and is updated on a five-year cycle. Compliance with this standard ensures that loss coefficient data is consistent and reliable across different applications.

The official desktop application (available via the ASHRAE bookstore) includes an "Export to Excel" feature. You can select the specific fittings used in your project and export the calculated coefficients directly into a .csv or .xlsx format to continue your calculations. 2. Third-Party Add-Ins

By establishing an , engineering firms can automate static pressure drop calculations, reduce human transcription errors, and dynamically update calculations when duct sizes or flow rates change. Why Link the ASHRAE Duct Fitting Database to Excel?

ASHRAE periodically updates fitting coefficients based on new empirical research from technical committees (such as TC 5.2 on Duct Design). Ensure your Excel tool clearly documents which version of the ASHRAE database it references (e.g., DFDB Version 6.00.00). 2. Implement Input Validation Bounds

For engineering firms seeking a lightweight solution without active database connections, a flat-file lookup system is highly effective.

If you are building your own sheet based on ASHRAE data, you will need to account for:

. This file can be opened on a desktop for further analysis or integration into larger project files. Systematic Calculation : In a typical design "story," an engineer identifies the critical path