Common fittings like elbows, tees, transitions, and fan plenums.
💡 Always verify the "Loss Coefficient" units. Some databases use different reference velocities (main stream vs. branch stream), which can lead to significant errors if not linked correctly in your Excel formulas. If you’d like to build a custom tool, let me know:
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 ashrae duct fitting database excel link
For those without the software, the ASHRAE Handbook—Fundamentals provides tables for common fittings. Many firms build their own internal Excel libraries by manually inputting these tables. Benefits of Linking ASHRAE Data to Excel
), which is vital for proper fan sizing and system balancing. How to Access the "Excel Link" Common fittings like elbows, tees, transitions, and fan
Keep your heating/cooling loads and duct static pressure calculations in one project file.
Link fitting losses directly to your equipment schedules. branch stream), which can lead to significant errors
The ASHRAE Duct Fitting Database (DFDB) is the industry standard for calculating pressure loss in HVAC systems. While the official software is a standalone application, many engineers prefer the flexibility of Excel for complex project calculations.