Ventilation Dilution Calculator

Calculate required dilution ventilation to control airborne contaminants below TLV/PEL limits.

Generation Rate (mg/min)

Molecular Weight (g/mol)

TLV/PEL Limit (ppm)

Safety/Mixing Factor (K)

Supply Air Conc. (ppm)

Room Volume (ft³)

Tab to move between fields

Required Ventilation (CFM)

55.3

Dilution Ratio500,000

Air Changes / Hour Needed0.66

Vapor Generation (CFM)0

Target Concentration (ppm)10

Steady State No Dilution110.7

Steady State At Required10

How to Use This Calculator

Enter Generation Rate (mg/min), Molecular Weight (g/mol), and TLV/PEL Limit (ppm).
Set Safety/Mixing Factor (K), Supply Air Conc. (ppm), and Room Volume (ft³).
Review the Required Ventilation (CFM) result.
Use Dilution Ratio and Air Changes / Hour Needed to inform your decision.

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