ASHRAE provides official pathways to access the database safely and legally:
ASHRAE offers standalone desktop applications as well as web-based subscription models for the database. These tools are frequently integrated directly into commercial BIM (Building Information Modeling) and HVAC design software like Autodesk Revit or Wrightsoft.
The ASHRAE Duct Fitting Database Version 6.0 is a valuable tool for HVAC professionals, providing a comprehensive collection of duct fitting data and calculation capabilities. The database can be downloaded for free from the ASHRAE website, and installation is straightforward. By using the ASHRAE Duct Fitting Database Version 6.0, HVAC professionals can optimize duct design, ensure efficient airflow distribution, and comply with ASHRAE standards. ASHRAE provides official pathways to access the database
While ASHRAE has released newer online versions (e.g., DFDB Online), Version 60 remains popular for several reasons:
The official software is distributed through the ASHRAE Bookstore and other authorized standards stores like Accuris . The database can be downloaded for free from
(official method):
Purchasing an official license ensures access to accurate data sets, technical support, compatibility updates for modern operating systems, and patches for software bugs. Technical Functionality and Design Impact This leads to undersized fans
: Version 6.00.05 specifically increased input ranges for several transitions and elbows (e.g., SR4-3, ER4-3, CR3-17) and added new fittings like flexible elbows and straight duct variants. Customizable Settings
: Modified or corrupted database files can yield incorrect pressure loss coefficients. This leads to undersized fans, poor building airflow, and potential legal liability for the design firm.
This mobile app provides pressure loss calculations for selected fittings from the 2021 ASHRAE Handbook—Fundamentals.
: The full version is primarily available as a cloud-based annual subscription .