That Mysterious Dashboard Button? It’s Your Car’s Air Recirculation System—And You Should Know How to Use I

While recirculation feels cozy, it gradually depletes oxygen and concentrates CO₂, which can contribute to drowsiness or fatigue. Letting in fresh air helps maintain alertness and overall air quality.

Pro Tip: Maintain Your Cabin Air Filter
For recirculation (and your entire HVAC system) to work effectively, your cabin air filter must be clean. A clogged filter restricts airflow, reduces cooling efficiency, and allows pollutants to bypass filtration.