The American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) has been a leading authority in the HVAC industry for over a century. One of the organization's most valuable resources is the ASHRAE Duct Fitting Database, a comprehensive collection of duct fitting configurations and their corresponding pressure loss coefficients. The latest version of this database, version 6.0.0.5, is a significant update that provides engineers with even more accurate and reliable data for designing and optimizing HVAC systems.
If you are designing data center cooling, hospital isolation rooms, or high-rise office ventilation, the precision offered by translates directly into capital cost savings (smaller fans, fewer silencers) and operational savings (lower energy bills).
: Refined mathematical models for rectangular fittings with high aspect ratios minimize calculation errors in constrained ceiling spaces. Interface and Integration Improvements ashrae duct fitting database version 60005
If you use AutoCAD MEP or Revit, the updated 60005 plugin fixes a persistent bug where dynamic pressure calculations would default incorrectly for metric (SI) workflows. The new version now passes the data model more cleanly, meaning fewer “Unknown Fitting” errors in your pressure drop reports.
| Specification | Details | | :--- | :--- | | | 6.00.05 | | Product Type | Standalone desktop application for Windows (XP, Vista, 7, 8, 10, 11) | | Architecture | 32-bit | | Licensing & Pricing | Commercial, ~$477 ; Single-user only, annual subscription for cloud-based access | | Fitting Coverage | 240+ round, rectangular, flat oval | | Data Output | Loss coefficient (C) and pressure drop (Δp) in I-P or SI units | | Mobile App | ASHRAE DFDB Lite (free, iOS) for a subset of fittings | | Related Standard | ANSI/ASHRAE Standard 120-2017 (Method of Testing) | If you are designing data center cooling, hospital
Contains loss coefficients for over 200 distinct fitting types.
The database serves as the digital companion to the ASHRAE Handbook—Fundamentals and ASHRAE Duct Design Guide . Instead of manually looking up tables and graphs, users can enter fitting parameters to calculate the pressure loss instantly. Why Use the Database? The new version now passes the data model
The heart of the data. For each fitting ID, this table lists: