Ashrae Duct Fitting Database Excel May 2026

The DFDB is a comprehensive repository containing loss coefficient tables and pictorial outlines for over 200–250 different round, rectangular, and flat oval duct fittings. It covers: duct functions.

: Engineers use the official ASHRAE DFDB Desktop Software or the ASHRAE DFDB Lite App to input specific airflow (CFM) and dimensions. The resulting pressure loss (typically in Pa or in. w.g.) is then manually entered into a custom Excel ESP calculation sheet to sum up the total system resistance. ashrae duct fitting database excel

For HVAC design professionals, the is an indispensable resource for ensuring precise airflow calculations and energy-efficient systems. While ASHRAE officially provides the database as a standalone software or a cloud-based subscription, many engineers prefer to integrate its data into an Excel environment to streamline external static pressure (ESP) calculations. What is the ASHRAE Duct Fitting Database? The DFDB is a comprehensive repository containing loss

While there is no "official" standalone ASHRAE Excel file available for direct download, professionals typically use the database in conjunction with spreadsheets in two primary ways: The resulting pressure loss (typically in Pa or in

support for both I-P (Imperial) and SI (Metric) systems. Integrating ASHRAE Data into Excel

including elbows, transitions, junctions, and dampers.