2. On Scorching Hot Days
If your car has been sitting in the sun, turn the A/C on and hit the recirculation button. It is much easier for your car to cool down air that is already somewhat chilled inside the cabin than to constantly try to cool 90°F air from outside. This also reduces the load on your engine, saving you fuel.
3. High Pollen or Dust Seasons
If you suffer from allergies, keeping the air recirculating is a lifesaver. It creates a closed loop, ensuring that fresh waves of pollen or road dust aren’t constantly being pumped directly into your face.
⚠️ When You Should NEVER Use It
1. In Freezing Winter Weather
If you use recirculation in the winter, the humidity from your breath gets trapped inside. This will cause your windows to fog up rapidly, creating a dangerous driving situation. Always use fresh air mode when defrosting your windshield.
2. On Long Solo Trips (Drowsiness)
If you keep the air recirculating for hours with several passengers, the CO2 levels inside the car can rise slightly. This can lead to headaches or a feeling of “stuffiness” and sleepiness. Every hour or so, it’s a good idea to switch to fresh air for a few minutes to oxygenate the cabin.
