The SmartExhaust is easiest, most cost efficient way to help make a home ASHRAE 62.2 compliant.
The SmartExhaust has a microprocessor that is set to automatically turn the fan on once per hour for a set amount of time--from 1-60 minutes. While running, the SmartExhaust is sending stale indoor air outside. The stale air is replaced by fresh air via a Fresh Air System (FAS), a Make-Up Air System or another inlet. When the fan is manually turned on, the SmartExhaust automatically counts that time used and deducts it from the amount scheduled for that hour.