Duct Fitting Loss Coefficients: tee_main_straight
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 |
|---|---|---|---|---|
| tee_main_straight | all | 0.1 | Tee fitting - main duct straight-through branch (converging or diverging) | Loss in main duct continuing past branch takeoff; C referenced to main duct velocity pressure |
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