After installation, don't forget to reset your default “Roughness” parameters. Version 60005 resets to standard galvanized steel (0.0003 ft), but your local jurisdiction may require different defaults.
Minimize Acoustic Issues: High pressure drops often correlate with high velocity and turbulence, which generate noise. Proper fitting selection keeps decibel levels within acceptable limits for offices and residential spaces. Implementation and Compliance ashrae duct fitting database version 60005
ΔPdynamic=K⋅(ρ⋅V22)cap delta cap P sub d y n a m i c end-sub equals cap K center dot open paren the fraction with numerator rho center dot cap V squared and denominator 2 end-fraction close paren where is the loss coefficient, is air density, and is air velocity. After installation, don't forget to reset your default