Air Change Calculator for Facility Construction and Renovation

Determining the Number of Abatement HEPA-AIRE Units 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... 6 7.5 9 12 15 18 24 30

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... 25% 50% 75% 100%

Select the HEPA-AIRE model or the peak airflow rate needed for the room in cubic feet per hour:

(show calculations for all models) PRED1200HC, 54,000 CFH PRED1200UVHC, 54,000 CFH PRED600HC, 36,000 CFH PAS2400HC, 126,000 CFH PAS1200HC, 54,000 CFH PAS600HC, 36,000 CFH