Should You Use Recirculation or Fresh Air Mode in Hot Weather?
2 Answers
When driving in hot weather, you should use the recirculation mode. Advantages of using recirculation mode: Using recirculation mode helps reuse cool air, reduces cooling consumption, and consequently lowers engine fuel consumption. However, remember to open windows for ventilation to avoid discomfort caused by poor air circulation. Precautions for using car recirculation mode: After entering the car, you should open the windows or activate the fresh air ventilation system for a short period to introduce fresh air. Do not drive for extended periods with windows and doors closed, and never sleep or rest for long durations in a completely sealed car. When using air conditioning or heating, occasionally switch to the fresh air mode to avoid prolonged use of the recirculation mode.
When I first started driving, I had no idea about the difference between recirculation and fresh air modes. Later, I figured it out myself. On extremely hot days, it's a good habit to open the windows for ventilation before getting in the car. After turning on the AC, I immediately switch to recirculation mode because the interior temperature is too high at this point. Recirculation cools the cabin faster by preventing hot outside air from entering. After about seven or eight minutes when the temperature drops, I switch to fresh air mode to introduce outside air and avoid stuffiness from prolonged recirculation. On highways, it's especially important to pay attention – continuous recirculation can make you drowsy. When parked and waiting, I use fresh air mode to prevent carbon monoxide buildup. Alternating between these two modes is the smartest approach, ensuring both coolness and health.
