• diluting the pollutants originating in the building and
• removing the pollutants from it.

It is necessary to conduct Ventilation Study

• to identify Air velocity or number of air changes in workplace &
• to identify any discomfort conditions within premises.

It is also important to conduct the Ventilation Study periodically to ensure & document that the parameters (e.g. - Air Velocity / Air Flow Changes) are within the limits as required by specification given under statutes.