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Duct Fitting Loss Coefficients: entry_rect_ed7_2

Loss coefficients (C-values) for duct fittings — elbows, tees, wyes, transitions, entries, exits, and specialty fittings per ASHRAE Fundamentals and SMACNA. dP = C * Vp where Vp is velocity pressure at the referenced duct cross-section.

Mechanical Engineeringfitting_type: entry_rect_ed7_23 rows
fitting typesize or rangeC0 (dimensionless)ashrae codegeometry notesstandard
entry_rect_ed7_2Ldo0.5_vr01.8ED7-2Rectangular main entry ED7-2; L/Do=0.5, velocity ratio pv_out/pv_in=0; C referenced to upstream duct VpASHRAE Handbook Fundamentals 2021 Ch.21 Table 7
entry_rect_ed7_2Ldo0.5_vr100.53ED7-2Rectangular main entry ED7-2; L/Do=0.5, velocity ratio=10ASHRAE Handbook Fundamentals 2021 Ch.21 Table 7
entry_rect_ed7_2Ldo0.5_vr21ED7-2Rectangular main entry ED7-2; L/Do=0.5, velocity ratio=2ASHRAE Handbook Fundamentals 2021 Ch.21 Table 7

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