: A "Lite" version of the app is available on the Apple App Store for quick field calculations on iPhone and iPad.

The ASHRAE Duct Fitting Database (DFDB) Version 6.00.05 is a cloud-based engineering tool providing loss coefficients for over 200 HVAC fittings to calculate External Static Pressure (ESP). It supports round, rectangular, and flat oval ducts, facilitating detailed pressure loss calculations and integration with BIM tools. For more details, visit Duct Fitting Database - ASHRAE

: Fittings and results can be saved into specific project files for easy navigation, storage, and transfer.

: Flexible elbows with specific radius/diameter ratios (r/D=1.0 and 1.5). Technical Fixes Corrected table copying errors for fitting Fixed equations for fitting and synchronized database tables for Increased input ranges for several fittings, including Carmel Software 💻 Access and Availability Cloud Access : The desktop version is now primarily available through a one-year annual subscription for cloud-based access. Mobile Compatibility : ASHRAE offers a Duct Fitting Database Lite