When Should You Turn on the Internal Air Circulation?
2 Answers
In situations where a relatively enclosed environment is needed to prevent external air from entering, you can turn on the internal air circulation. Situations requiring the use of internal and external air circulation: 1. After the vehicle has been exposed to the sun outdoors, first turn on the external air circulation for ventilation and heat dissipation when you get in the car. You can also open the windows and sunroof to speed up the cooling process. After 3 to 5 minutes, when the interior temperature has stabilized, close the windows, turn on the air conditioning, and switch the air circulation to internal. 2. During traffic jams, it is best to turn off the external air circulation to block exhaust fumes from the vehicle in front. 3. In cold weather, wait a moment after getting in the car until the engine temperature reaches the normal level, then turn on the heating with internal air circulation to quickly raise the temperature. 4. During high-speed driving, you can turn on the external air circulation as needed. Prolonged use of internal air circulation during high-speed driving can lead to stale air inside the car, so turning on the external air circulation helps maintain the interior temperature while providing fresh air. However, do not keep the external air circulation on continuously; instead, turn it on periodically to refresh the air.
I've got plenty of experience with using the air recirculation mode! After 20 years of driving, I've identified several must-use scenarios. It's absolutely essential during traffic jams, especially during rush hours when surrounded by vehicles emitting exhaust fumes - recirculation blocks out all that black smoke. It's most practical right after entering the car in summer when it's 40°C outside; combining recirculation with AC cools the cabin down to a comfortable temperature in just three minutes. It's crucial when passing through tunnels or industrial areas too - like those chemical plant odors, you'd practically suffocate without recirculation. It's also perfect for long-distance AC use, as recirculation cools faster and saves fuel. Two important reminders: first, use recirculation on humid rainy days to prevent window fogging; second, never keep it on continuously for over 30 minutes, as stale air can make you drowsy - remember to switch to fresh air mode periodically.
