Using pirated software violates copyright laws and professional codes of ethics. Corporate environments face severe financial penalties during software audits if unlicensed engineering tools are found on company assets. Legitimate Ways to Access ASHRAE Data
Always ensure you're using a legitimate copy to guarantee accurate coefficients and avoid legal issues."
While is a robust tool, seeking a free download online is risky and illegal. Professionals are advised to purchase the current version directly from ASHRAE or utilize the coefficient tables within the ASHRAE Handbook—Fundamentals for manual calculation.
Beyond the database, version 6.00.05 includes several enhancements that improve workflow:
The ASHRAE Duct Fitting Database is a comprehensive digital catalog containing loss coefficient data for more than 200 round, rectangular, and flat oval duct fittings. ashrae duct fitting database 6.00 05 free download
Duct design requires accurate calculations to ensure proper airflow, system efficiency, and acoustic comfort. The ASHRAE Duct Fitting Database simplifies this process by providing a centralized repository of experimental data.
If you are a student, ASHRAE offers massive discounts on software, handbooks, and membership. Purchasing through student programs ensures you receive clean, accurate, and legal software at a fraction of the commercial cost. Web-Based Subscriptions
A: If you are having trouble installing the program, close all open programs—including those minimized in the taskbar—and try again.
Version 6.00.05 includes a fully searchable PDF of the User’s Manual for ASHRAE Duct Fitting Database , which explains the theoretical basis (Static Regain, Equal Friction, T-Method) behind each coefficient. Professionals are advised to purchase the current version
The authoritative source for the Duct Fitting Database is ASHRAE . The database is typically sold as a single-user product on CD-ROM. "Free Download" Misconceptions Searching for a "free" version often leads to:
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).
The American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) Duct Fitting Database is a valuable resource for engineers, architects, and building designers who work with heating, ventilation, and air conditioning (HVAC) systems. The database provides a comprehensive collection of duct fitting loss coefficients, which are essential for designing and optimizing HVAC systems.
Third-party "informer" sites might list the database, but downloading from unauthorized sources poses risks of malware or incomplete data. The ASHRAE Duct Fitting Database simplifies this process
The ASHRAE Duct Fitting Database is a comprehensive digital catalog that provides pressure loss coefficients (K‑values) for hundreds of common HVAC duct fittings, such as elbows, transitions, tees, and takeoffs.
A free app for iPhone and iPad that performs pressure loss calculations for 14 select supply, common, and return/exhaust fittings. It is available on the Apple App Store .
: Features a "Global Settings" tab to adjust air temperature, elevation, and barometric pressure, which automatically impacts calculations. Free vs. Paid Comparison DFDB Lite (Free Mobile App) Full DFDB (Paid Subscription) Fitting Count Select supply/exhaust fittings (approx. 14) 240+ comprehensive fittings Platform iOS (iPhone/iPad) Cloud-based Web Interface Units Both I-P and SI units Both I-P and SI units Reporting Basic email reports with spreadsheets Advanced project file storage & export
As of May 2026, the official and most up-to-date, accurate data is accessed directly through the ASHRAE Bookstore website .