Ashrae Duct Fitting Database Excel __full__ File
cloud-based web application
The ASHRAE Duct Fitting Database (DFDB) is a comprehensive digital library used by HVAC engineers to calculate pressure losses across more than 200 types of round, rectangular, and flat oval fittings. While the core database is provided as a or a mobile app, many professionals integrate this data into Excel spreadsheets to perform the total External Static Pressure (ESP) calculations required for sizing fans and air handling equipment. Key Features and Access Duct Fitting Database - ASHRAE
- Included with ASHRAE Handbook (CD/DVD or digital download) for members.
- Some versions available via ASHRAE’s “Duct Fitting Database” product (paid).
- Not generally free; copyright protected by ASHRAE.
- Fitting IDs (e.g., CD3-9, CR2-1, ES5-2)
- Fitting descriptions (e.g., 90° smooth radius elbow, rectangular)
- Geometric parameters (Radius ratio, aspect ratio, angle)
- Loss coefficients (C or C₀) for various Reynolds numbers and velocities.
- Offline & editable – No need for proprietary software or continuous license.
- Customizable – Add project-specific fittings or local correction factors.
- Integrates with design workflows – Link to Excel-based duct sizers, fan sizing, or energy models.
- Faster lookups – Use filters, PivotTables, or named ranges to find C-values quickly.
- Auditable – Formulas and data sources can be reviewed and validated.
Excel
ASHRAE does not provide a direct version of the entire Duct Fitting Database (DFDB) . Instead, the official tool is a cloud-based application available by annual subscription, which contains loss coefficient tables for over 200 fitting types. How to use ASHRAE data in Excel ashrae duct fitting database excel
Benefits and Limitations Benefits:
Fitting Selection
: Locate the specific fitting (round, rectangular, or flat oval) and retrieve its pictorial outline and loss coefficient. cloud-based web application The ASHRAE Duct Fitting Database
The Excel file is organized into multiple sheets, generally including: Included with ASHRAE Handbook (CD/DVD or digital download)