Current residential ERV/HRV equipment typically maxes out at 2,500 CFM, which limits the outdoor air component of total air cleaning to that capacity; 5-6 ACH targets cannot be met through outdoor air alone.
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JeffEvidence Quote
“ervs unfortunately don't run you know you can't get any RV in residential it's going to run up to 2500 CFM so you can't necessarily get that Max air cleaning out of just your outdoor”
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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