Ashrae Duct Fitting Database Version. 6.00.05 !!link!!

The ASHRAE Duct Fitting Database is not free software. It is available for purchase through the ASHRAE Bookstore (www.ashrae.org) as a digital download or USB drive. Pricing is typically:

The ASHRAE Duct Fitting Database is a collection of experimentally determined loss coefficients for various duct fittings, including elbows, tees, wyes, and transitions. These loss coefficients are used to calculate the pressure drop in duct systems, which is essential for designing and analyzing HVAC systems. The database contains data for a wide range of duct fitting geometries and configurations, making it a valuable resource for engineers and designers.

Last updated: September 2025 – verified against ASHRAE’s official release notes.

loss coefficient table that occurred during the transition from version 6.00.04. Carmel Software Core Capabilities of the DFDB This version maintains the foundational features of the ASHRAE Duct Fitting Database Comprehensive Coverage : Includes loss coefficient tables for over 200 round, rectangular, and flat oval duct fittings Pressure Loss Calculation ashrae duct fitting database version. 6.00.05

Categorized for easy navigation.

Features pictorial outlines and technical diagrams for every single fitting code (e.g., SR4-2 rectangular transitions or CR11-1 straight rectangular segments ), reducing user entry errors.

Do you need help calculating a specific ? The ASHRAE Duct Fitting Database is not free software

Efficient HVAC design relies on accurate pressure loss calculations. The ASHRAE Duct Fitting Database (DFDB) Version 6.00.05 is the industry-standard software tool used by mechanical engineers to compute loss coefficients for both supply and exhaust duct systems. This version introduces key data updates, enhanced OS compatibility, and a streamlined interface to minimize calculation errors. What is the ASHRAE Duct Fitting Database?

The latest version of the ASHRAE Duct Fitting Database, version 6.00.05, offers several significant enhancements over its predecessors. Some of the key features include:

The journey of the DFDB from a simple CD-ROM to a cloud-based platform is a story of continuous improvement. The version history provided by Carmel Software shows a clear trajectory of refinement: These loss coefficients are used to calculate the

Many universities use the DFDB for capstone projects. Version 6.00.05 includes a "Compare Fittings" feature—students can visualize how C changes with aspect ratio or turning vanes, reinforcing fluid mechanics concepts.

This formulation isolates the fitting’s contribution to total system pressure drop, allowing engineers to accurately sum losses from multiple fittings, straight duct sections, and other components (filters, coils, dampers, etc.).

The following fitting types and updates were introduced in this specific version: Carmel Software New Round Straight Duct Fittings (Velocity Limited) and (Constant Equal Friction). Flexible Elbow Fittings (Radius Ratio (Radius Ratio Increased Input Ranges

Developed by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), this database is the digital companion to the fitting loss coefficients found in the ASHRAE Handbook—Fundamentals . It moves beyond static tables, offering dynamic calculation capabilities that streamline the HVAC design process.