Hood Flow Rate

Hood Flow Rate

VE-04
ASPCSPAdvanced

Formula
Q = Ce × A × 4005 × √SPh
When to Use

Calculate airflow through a hood opening using hood static pressure and entry coefficient.

Symbol Legend
SymbolMeaningUnitNote
QVolumetric flow rate through hoodcfm
CeHood entry coefficient0 to 1; depends on hood design
AArea of duct at hood throatft²
4005Air density constantAt standard conditions
SPhHood static pressureabsolute valueAlways treated as positive

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