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
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 ashrae duct fitting database excel link
The database allows engineers to input specific dimensions and flow rates to receive an accurate dynamic loss coefficient ( Cocap C sub o Velocity ( ): Calculated from flow (CFM) and area
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 Total Pressure Loss: Calculated as Where to Buy
To effectively use an ASHRAE duct fitting link in Excel, you must have the following data points ready:
Keep your heating/cooling loads and duct static pressure calculations in one project file.