Duct Fitting Loss Coefficients: wye_45_equal
Loss coefficients (C-values) for duct fittings — elbows, tees, transitions, entries and exits per ASHRAE Fundamentals and SMACNA. dP = C * Vp where Vp is velocity pressure.
| fitting type | size or range | C0 (dimensionless) | description | geometry notes |
|---|---|---|---|---|
| wye_45_equal | all | 0.35 | Equal 45-degree wye fitting diverging flow split | Symmetrical wye dividing flow equally; C per branch referenced to common velocity pressure |
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