In COVID-19 classroom settings designed for pathogen control, air cleaning targets of 5-6 air cleanings per hour are recommended; the difference between 5 and 6 is not material.
factualpending
Speaker
JeffEvidence Quote
“there's no great science so functionally the difference between five and six I'm not going to split hair”
Source
Home Ventilation Advice from HVAC Researcher Jeffrey Siegel: How Many CFM is Ideal?— Home PerformanceCreated: 8/13/2026, 4:55:15 AM
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