Ashrae Duct Fitting Database Download [portable] Jun 2026

Typical result (from ASHRAE Handbook): C₀ = 1.2 , C₁ = 0 , C₂ = 0 , C₃ = 0 , C₄ = 0 (constant loss coefficient for turbulent flow)

The "C" coefficient changes based on the geometry of the fitting. A sharp 90-degree elbow has a much higher C-value than a radiused elbow. The DFDB provides these specific coefficients, removing the guesswork from the equation. ashrae duct fitting database download

Designing exhaust systems requires different assumptions, particularly regarding contaminants and density. The database provides specific coefficients for exhaust hoods and risers. Typical result (from ASHRAE Handbook): C₀ = 1

The is an indispensable digital resource for HVAC engineers, designers, and contractors tasked with precise airflow and pressure loss calculations. This comprehensive library provides empirical data to optimize system efficiency, reduce energy waste, and ensure accurate fan selection. Understanding the ASHRAE Duct Fitting Database reduce energy waste

The database quantifies this loss using the fundamental equation: