Ashrae Duct Fitting Database 2016 [patched] Official

The ASHRAE Duct Fitting Database (DFDB) is a critical digital resource for HVAC engineers, providing standardized loss coefficient tables for over 200 types of duct fittings. The 2016 timeframe marked a period of significant transition between Version 5.0 and the newer, cloud-based Version 6.0, which streamlined how designers calculate External Static Pressure (ESP) and optimize airflow in commercial and industrial systems. Core Functionality of the Database

Purpose: A Windows application and database of loss coefficients (equivalent lengths and K-values) for duct fittings to support HVAC airflow calculations and energy modeling.
Source: Published by ASHRAE; widely used by engineers and energy-modelers.
Content: Catalogs thousands of fittings (round, rectangular, transitions, offsets, takeoffs, dampers, etc.) with tested and tabulated loss coefficients; includes methodology notes and references to test standards.
Typical use cases: Duct sizing, system pressure-drop calculations, fan selection, energy simulations, commissioning, and validation of computational fluid dynamics (CFD) or modeling assumptions.

Mobile Accessibility: A "Lite" version of the app is available for free on the Apple App Store for field use. ashrae duct fitting database 2016

The 2016 version is formally the ASHRAE Duct Fitting Database v5.0, released in 2016 (some references call it the 2016 edition). It superseded v4.0 (2009) and was later updated by v6.0 (2020). The ASHRAE Duct Fitting Database (DFDB) is a

What is the ASHRAE Duct Fitting Database? Purpose: A Windows application and database of loss

Identify the duct fitting: Determine the type of duct fitting you need to analyze (e.g., elbow, tee, etc.).
Search the database: Use the search function to find the fitting in the database.
Select the fitting: Choose the fitting that matches your application, taking note of the size, configuration, and other relevant details.
Obtain the loss coefficient: Retrieve the loss coefficient for the selected fitting, which can be used in duct system design and analysis calculations.

Functionality: