Cleanroom HEPA Filter Calculator

Calculate number and sizing of HEPA filters required for cleanroom based on airflow and coverage requirements.

Total CFM required for cleanroom
CFM
1=2x4 (750 CFM), 2=2x2 (375 CFM), 3=1x4 (375 CFM)
ISO 5 and cleaner: 80-100%, ISO 6-7: 15-50%
%
Total cleanroom ceiling area
ft²

Results

CFM per Filter-CFM
Filters by Airflow-filters
Filters by Coverage-filters
Recommended Filter Qty-filters
References: ISO 14644-4 - Design, Construction and Start-up, ASHRAE Applications Ch. 18