Effective Ventilation

Ventilation Effectiveness

Ventilation effectiveness is an indicator of the quality of supply air distribution in ventilated rooms. It is a representation of how well a considered space is ventilated compared to a perfect air mixing condition.  Depending on pollutant properties and source position relative to the airflow, ventilation effectiveness can more or less successfully be used as an indicator of air quality and human exposure.

Another key component of ventilation in the confined space is to ensure that the ventilation systems in place are effective. As a general principle, ventilation systems should be set up with the following considerations:

  • Long confined space
  • Deep confined space
  • Prevent short-circuiting
  • Prevent re-circulation of exhaust air
  • Remove lighter-than-air contaminants
  • Remove heavier-than-air contaminants