Effective Ventilation Rate

Effective Ventilation Rate

VE-13
ASPCSPAdvanced

Formula
Q' = Q ÷ K
When to Use

Adjust actual ventilation rate for imperfect mixing using safety factor K.

Symbol Legend
SymbolMeaningUnitNote
Q'Effective dilution ventilation ratecfm
QActual airflow ratecfm
KMixing factor1–101=perfect; 10=very poor mixing

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