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
The specific code (e.g., SD5-1 for a mitered elbow). Velocity ( ): Calculated from flow (CFM) and area. Velocity Pressure ( Pvcap P sub v ): Usually calculated as for standard air. Loss Coefficient ( Cocap C sub o ): The value retrieved from the database. Total Pressure Loss: Calculated as Where to Buy and Download
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. ashrae duct fitting database excel link
), which is vital for proper fan sizing and system balancing. How to Access the "Excel Link"
Common fittings like elbows, tees, transitions, and fan plenums. ASHRAE does not provide a single, free Excel
Link fitting losses directly to your equipment schedules.
Keep your heating/cooling loads and duct static pressure calculations in one project file. Velocity ( ): Calculated from flow (CFM) and area
The database allows engineers to input specific dimensions and flow rates to receive an accurate dynamic loss coefficient ( Cocap C sub o
Finding a direct, functional "Excel link" for this database requires understanding how ASHRAE distributes the data and how you can integrate it into your spreadsheets. What is the ASHRAE Duct Fitting Database?