Which air circulation mode to use when the car interior temperature is high?
3 Answers
On highways, it is recommended to use the external air circulation mode. Due to wind resistance and high speeds, opening windows is not advisable on highways. Prolonged use of internal air circulation can lead to oxygen deprivation in the brain, impairing reaction time and judgment, which is extremely dangerous. Additionally, the air quality on highways is generally good with low exhaust concentrations, making external circulation a suitable choice. Precautions for highway driving are as follows: 1. Safety inspection: Check for potential safety hazards before driving. Conduct a thorough vehicle inspection before entering the highway. 2. Seat belts: Always wear seat belts in both front and rear seats, and avoid placing loose objects in the car. 3. Maintain lane discipline: Avoid frequent lane changes on highways, switching between passing lanes and travel lanes. Never make sudden unannounced decelerations or stops in travel lanes. Do not drive side by side with other vehicles, remain in the passing lane for extended periods, or attempt to overtake from the emergency lane. Also, prepare for lane changes well in advance when exiting the highway to avoid missing your exit.
When the temperature inside the car is particularly high, I usually turn on the recirculation mode immediately. This quickly circulates and cools the air inside the car instead of drawing in hot outside air, effectively trapping and dealing with the heat. The air conditioning becomes more efficient, cooling the car down much faster. I've tried this many times—like when driving into an underground garage in summer and emerging into a wave of heat. With recirculation on, it becomes comfortable within minutes. However, I don’t keep it on indefinitely; after about ten minutes, I switch to fresh air mode to ventilate the cabin. Otherwise, the air inside can get too stuffy, especially in traffic, which might cause dizziness. Additionally, modern cars come with automatic climate control. I usually press the AUTO button after starting the car—it adjusts fan speed and air circulation automatically based on temperature, making things much easier. Just remember, you can manually increase the fan speed for faster cooling while ensuring fresh air circulation. In short, use recirculation for quick cooling, but switch modes periodically to maintain comfort.
When it's unbearably hot in the car, I usually turn on the recirculation mode first to speed up the air conditioning, preventing hot outside air from entering and allowing the cooling system to focus on handling the interior heat. Remember, the air conditioning compressor has a lighter load this way, consuming less fuel, especially during scorching summer drives. However, I don't rely on it for too long; after about 15-20 minutes, I switch back to fresh air mode to introduce outside air and prevent CO2 buildup, which is crucial for health and alertness. The car's automatic climate control is quite smart—once you set the temperature, it adjusts the fan speed and air circulation mode automatically, saving me the hassle of manual switching. If manually adjusting the fan speed, higher settings cool the car down much faster. Handy tip: Don't forget to close the windows when using recirculation mode for better efficiency; on highways, fresh air mode is often more effective. Keeping air flowing is key.
