Ashrae Duct Fitting Database Version 60005 [patched]

The ASHRAE Duct Fitting Database (DFDB) Version 6.00.05 is the industry-standard software tool for engineers to calculate pressure losses in HVAC duct systems. It provides access to loss coefficient tables for over 200–250 fittings, including round, rectangular, and flat oval types. Key Features & Capabilities

Integrated Explorer View: Provides a graphical overview of all headings and fittings for faster navigation within the database. Version 6.00.05 Specific Updates ashrae duct fitting database version 60005

1. Ignoring the "Upstream vs. Downstream" Distinction

Version 60005 differentiates between diverging (splitting flow) and converging (joining flow) tees. Using the same (C) for both can cause 200% error. The ASHRAE Duct Fitting Database (DFDB) Version 6

This specific version (released 4/5/16) addressed several technical fixes and added new fitting data: Carmel Software New Fittings Added Version 6

At the heart of the ASHRAE Duct Fitting Database is the concept of the loss coefficient (C). Every elbow, tee, transition, and hood in a ventilation system introduces turbulence and friction, leading to a drop in total pressure. If an engineer overestimates these losses, they specify a fan that is too large, leading to wasted energy and excessive noise. If they underestimate, the system will fail to deliver the required airflow to the occupied spaces.

Real-Time Calculations: The interface allows for immediate calculation updates as data is entered, with fully viewable input/output properties.

New Fitting Additions: Specifically added CD11-4 (Straight Round, Constant Equal Friction) and CD11-3 (Straight Round, Velocity Limited), as well as flexible elbow fittings CD3-22 and CD3-23.