Unflanged Hood Capture Velocity

Unflanged Hood Capture Velocity

VE-09
ASPCSPAdvanced

Formula
Q = V(10x² + A)
When to Use

Calculate airflow needed to achieve a target capture velocity at a specific distance from an unflanged hood opening.

Symbol Legend
SymbolMeaningUnitNote
QRequired airflowcfm
VRequired capture velocity at distance xfpm
xDistance from hood face to sourceftAccurate to 1.5× duct diameter
AArea of hood openingft²

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