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Calcimator

Ventilation Dilution Calculator

Calculate required dilution ventilation airflow (CFM) to maintain a target airborne concentration from a known contaminant generation rate.

Inputs

Results

Required airflow (CFM)

19,218

Required airflow (m³/hr)32,651
Air changes per hour115.3
99% purge time (min)2.4
Vapour generation (cfm)0.05
Generation (pints/min)0.01
How to Use This Calculator
  1. Enter Generation rate (mL/min), Molecular weight (g/mol), and Specific gravity.
  2. Set Target concentration (ppm), Safety factor (K), and Room volume (ft³).
  3. Review the Required airflow (CFM) result.
  4. Use Required airflow (m³/hr) and Air changes per hour to inform your decision.
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