On an Ecobee smart thermostat, the ideal setting for minimum fan run time is typically between 15 and 20 minutes per hour during normal heating or cooling seasons. This feature, known as "Min Fan On Time," ensures that your HVAC system circulates indoor air regularly, preventing hot or cold spots from forming in distant rooms, filtering dust through your air filter more effectively, and equalizing humidity levels. Setting it too high will unnecessarily drive up your electricity bill by running the blower motor constantly, while setting it too low can leave stale air stagnant. Verification: Navigate to Main Menu > Settings > Installation Settings > Thresholds > Fan Min On Time on your Ecobee device to adjust your preferred hourly circulation duration.
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