When to Turn on the Car's Recirculation Mode?
2 Answers
Car's recirculation mode is generally turned on when you need to quickly cool down or heat up the interior, preventing external cold air or hot wind from entering the cabin. It is also used when the external air quality is poor, such as in traffic jams where there is a lot of exhaust fumes, or during dusty and hazy weather, to prevent pollutants from entering the car. Definition of Car's Recirculation Mode: Recirculation mode means the air blown by the blower circulates only inside the car. Since no external air is involved, it has the advantages of saving fuel and faster cooling or heating, but the disadvantage is that it does not facilitate the renewal of the cabin air. Difference Between Recirculation Mode and Fresh Air Mode: Different principles: recirculation mode circulates the air inside the car in a closed environment, while fresh air mode brings external air into the cabin. Different locations: the air intake for recirculation mode is inside the car, preventing outside air from entering, while the air intake for fresh air mode is located below the front windshield wiper, drawing in external air. Different effects: prolonged use of recirculation mode can lead to stale air, decreased oxygen levels, causing discomfort, fatigue, anxiety, and affecting driving safety; fresh air mode ensures air circulation between the inside and outside of the car, preventing excessive carbon dioxide concentration.
I often use the air recirculation mode in my car, especially when the outside air is poor. For example, during severe smog when everything is hazy and the road is hard to see, turning on recirculation keeps the dirty air out. When driving past construction sites or areas with many trucks where dust is flying everywhere, using recirculation keeps the interior much cleaner. If passing by a landfill or industrial area with unpleasant odors, quickly switching to recirculation makes the ride much more comfortable. During allergy season, recirculation also helps reduce sneezing from pollen. However, it's good to remember that on long drives, it's best to switch back to fresh air mode every half hour to ventilate the car, otherwise the air inside can get stuffy.
