For Version 6.00.05, ASHRAE provides a specific set of FAQs that address common user issues:
) for over 200 distinct geometries. Total local pressure loss ( ) is determined using the universal equation:
Contains the master catalog of 2,100+ fittings, each with a unique 5-digit ID (e.g., T020 for a diverging 45-degree wye).
) for the fitting is computed by multiplying the velocity pressure by the ASHRAE-defined dimensionless loss coefficient ( Cocap C sub o Δp=Co×Pvdelta p equals cap C sub o cross cap P sub v Version 6.00.05 looks up the precise Cocap C sub o
: Includes loss coefficient tables for over 200 round, rectangular, and flat oval fittings. ashrae duct fitting database version 60005
Let’s walk through a real-world example: A at 4,000 CFM.
When fans are installed with poor inlet or outlet conditions (e.g., a fan blowing directly into a 90-degree elbow without a straight length), the fan's performance degrades significantly. Manufacturers rate fans in laboratory conditions; the DFD provides the coefficients necessary to calculate the real-world penalty.
However, for the next 3–5 years, will remain the baseline for LEED energy modeling and code-compliant commercial design.
: Allows users to enter flow rates and fitting dimensions to instantly obtain the loss coefficient ) and the resulting pressure loss cap delta cap P System Modes For Version 6
Do you need an example of a (e.g., a rectangular elbow with vanes)?
For decades, HVAC engineers relied on Chapter 21 of the ASHRAE Handbook—Fundamentals. The pages containing loss coefficient tables ($C_0$ values) for elbows, transitions, and takeoffs were often the most dog-eared in the book.
Let’s unpack why this update is worth more than a version number bump.
: The latest version is available via an annual subscription, allowing for easier updates and accessibility. Extensive Library Let’s walk through a real-world example: A at 4,000 CFM
That difference of seems tiny. But multiply that by 1,000 fittings in a hospital, and you have a 10% difference in the total static pressure required. That determines whether the contractor installs a 15 HP motor or a 20 HP motor . Over a year, that is thousands of dollars in electricity. The database is, effectively, a financial instrument.
Version 6.00.05 introduced critical software patches, database expansions, and fixed formula syntax errors found in earlier sub-versions like 6.00.04. 1. Added Fitting Profiles
[Your Name] is an HVAC designer with 12 years of experience in commercial high-rise systems.
: Fittings can be grouped and saved into individual project files, which are small enough for easy transfer and navigation.
