Ashrae Duct Fitting Database Excel -

: A free app for iPhone/iPad with a subset of fittings.

The ASHRAE Duct Fitting Database (DFDB) is the industry standard for calculating pressure losses in commercial and residential ventilation systems. While ASHRAE distributes this database as standalone software, many mechanical engineers, estimators, and system designers prefer integrating this data directly into Microsoft Excel.

To help expand your template or troubleshoot specific code formulas, tell me: Are you designing for or Metric (SI) units? ashrae duct fitting database excel

Excel can link duct sizing calculation sheets directly to fitting loss coefficients, eliminating manual data entry.

: A paid mobile version containing all 240+ fittings from the 2021 ASHRAE Handbook. Alternative Excel Solutions : A free app for iPhone/iPad with a subset of fittings

The Ultimate Guide to the ASHRAE Duct Fitting Database Excel: Streamlining HVAC Design

: ASHRAE sells a physical Duct Size Calculator (slide rule style) and a desktop version that provides similar functionality. To help expand your template or troubleshoot specific

[Fitting Input] ➔ [Lookup Formula] ➔ [Find C-Factor] ➔ [Multiply by Pv] ➔ [Add to Total ESP] How to Build an Automated Fitting Lookup Formula

The challenge is that each fitting has a different set of geometric parameters. For example:

Excel files are universally accessible, making it easy to share calculations with clients, contractors, or team members without requiring specialized software licenses.

Always use official ASHRAE codes (e.g., SD, CD, ED prefixes) to maintain consistency across team projects.