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Duct Fitting Loss Coefficients: entry rect ed7 2

Ldo4.0 vr0 to Ldo4.0 vr5

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 24 rowsPage 3 of 3
fitting typesize or rangeC0 (dimensionless)ashrae codegeometry notesstandard
entry rect ed7 2Ldo4.0 vr00.67ED7-2Rectangular main entry ED7-2; L/Do=4.0, velocity ratio=0ASHRAE Handbook Fundamentals 2021 Ch.21 Table 7
entry rect ed7 2Ldo4.0 vr100.22ED7-2Rectangular main entry ED7-2; L/Do=4.0, velocity ratio=10ASHRAE Handbook Fundamentals 2021 Ch.21 Table 7
entry rect ed7 2Ldo4.0 vr20.4ED7-2Rectangular main entry ED7-2; L/Do=4.0, velocity ratio=2ASHRAE Handbook Fundamentals 2021 Ch.21 Table 7
entry rect ed7 2Ldo4.0 vr50.22ED7-2Rectangular main entry ED7-2; L/Do=4.0, velocity ratio=5ASHRAE Handbook Fundamentals 2021 Ch.21 Table 7

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