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- NFPA 101
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Resources - NFPA 33 Codes: Copyright NFPA
3.3.14 Ventilation.
As specified in this code, movement of air that is provided for the prevention of fire and explosion. It is considered adequate if it is sufficient to prevent accumulation of significant quantities of vapor-air mixtures in concentrations over one-fourth of the lower flammable limit. [30:1.6]
