Version 6.00.05 reports standard deviation for each coefficient (a major improvement). For critical systems (hospitals, cleanrooms), use C₀ + 1σ.
The consultant nodded. "We're also on 6.00.05. Approved."
loss coefficient table that occurred during the transition from version 6.00.04. Carmel Software Core Capabilities of the DFDB This version maintains the foundational features of the ASHRAE Duct Fitting Database Comprehensive Coverage : Includes loss coefficient tables for over 200 round, rectangular, and flat oval duct fittings Pressure Loss Calculation ashrae duct fitting database version. 6.00.05
The accuracy of the DFDB is underpinned by rigorous testing standards. , "Method of Testing to Determine Flow Resistance of HVAC Ducts and Fittings," provides the uniform laboratory testing methods used to measure airflow resistance. The data from at least six major research projects based on this standard directly feed into refining and updating the Duct Fitting Database. This scientific backbone ensures that the loss coefficients you use are based on empirical evidence.
to secure your subscription or update your current desktop installation. Version 6
Using outdated versions or manual look-up tables risks non-compliance with modern building energy codes.
Rumored features for v7 (anticipated 2027) include: "We're also on 6
The software uses the classic fluid mechanics pressure loss equation:
By linking pressure loss directly to fan energy consumption, the feature could estimate the annual energy cost savings