ASHRAE Fundamentals (Chapter 34) – printed or via public library reference – contains abridged loss coefficient tables. Not as searchable as DFDB, but legally free if borrowed.
Before we dive into the specifics of version 6.00.05, it is vital to understand what this software actually is. The ASHRAE Duct Fitting Database is a digital implementation of the data found in the ASHRAE Fundamentals Handbook (Chapter 34, "Duct Design") and the ASHRAE Duct Fitting Database (DFDB) technical standard.
Historically, engineers had to manually look up "Dynamic Loss Coefficients" (C or Co) using printed tables and complex interpolation. The database changed the game by offering: ashrae duct fitting database 6.00 05 free download
Version 6.00.05 represents a mature, stable release that includes all corrections and errata up to its publication date, making it one of the most trusted versions for legacy projects.
The ASHRAE Duct Fitting Database is the industry-standard software for calculating pressure loss (friction and dynamic losses) for various HVAC duct fittings. Version 6.00.05 represents a specific legacy release of this tool. ASHRAE Fundamentals (Chapter 34) – printed or via
Crucial Note on "Free Download": There is no legal free version of the ASHRAE Duct Fitting Database v6.00.05. ASHRAE sells this software as a fundraising tool to support research and society activities. Downloading this software from "warez," torrent, or unauthorized file-sharing sites constitutes software piracy and poses significant security risks (viruses/malware).
Do not use them. The official 6.00.05 version does not require a license key or activation server. Any "crack" is simply a malicious repackaging of the free legitimate installer. Download only from ashrae.org domains or trusted educational repositories like designbuilder.co.uk (a certified partner). Version 6
The ASHRAE Duct Fitting Database is a digital repository that codifies the loss coefficients (often denoted as "C" or "C") for thousands of duct fittings. It is the digital companion to the ASHRAE Handbook—specifically the 2009, 2013, 2017, and 2021 ASHRAE Handbook—Fundamentals, Chapter 34 (Duct Design).
Before this database, engineers spent hours manually interpolating charts and tables. The database automates this, allowing users to:
Many engineering firms own a site license. Ask your IT or mechanical department for a copy.