One common source of error is using the wrong velocity pressure (upstream vs. downstream). Version 6.00.05 explicitly labels whether the loss coefficient is based on:
Users input the physical dimensions of the fitting alongside the volume flow rate. The engine instantly calculates: and Velocity Pressure ( Pvcap P sub v ) Loss Coefficient ( Cocap C sub o ) Total Pressure Drop ( ΔPcap delta cap P ) across the fitting Why Version 6.00.05 Matters for Modern HVAC Design Overcoming the Flaws of "Rule of Thumb" Sizing
Enhanced stability when running alongside modern CAD and BIM software. 3. Flexible Unit Systems ashrae duct fitting database version. 6.00.05
Round, rectangular, and flat oval configurations.
ΔP=C0×(ρ×V22)cap delta cap P equals cap C sub 0 cross open paren the fraction with numerator rho cross cap V squared and denominator 2 end-fraction close paren C0cap C sub 0 is the dimensionless , is air density, and is air velocity. One common source of error is using the
Ready to upgrade or purchase for the first time? Visit the ASHRAE website, search for "Duct Fitting Database Version 6.00.05," and download the product data sheet. For bulk licensing (5+ seats), contact ASHRAE customer service for a 15% educational discount.
: Enter dimensions such as width, height, diameter, radius ratio, or upstream/downstream angles. The engine instantly calculates: and Velocity Pressure (
Fully compatible with 64-bit Windows 10 and Windows 11 environments.
Open the database and navigate the tree structure. For example, to find a rectangular pleated elbow, navigate to: Rectangular Fittings > Elbows > Pleated . Step 3: Input Geometric and Flow Ratios