Air Change Calculator

Determining the Number of Abatement HEPA-AIRE Negative Air Machines Needed

Room dimensions (in feet):

long x wide x high (to drop ceiling)
-or-
cubic feet

Select the number of air changes per hour (ACH) you would like to have for the room:

Select a safety margin that compensates for airflow losses such as duct leakage, filter loading, etc:
(The safety margin will be used in the calculations to determine the net ACH of the room)

Select the model or the peak airflow rate needed for the room in cubic feet per minute: