Should You Use Recirculation or Fresh Air Mode When Turning on the AC?
3 Answers
When turning on the AC, it is generally recommended to use the recirculation mode. Here is a detailed introduction to the car's recirculation and fresh air modes: 1. Fresh Air Mode: This mode draws air from outside the vehicle, directs it to the air conditioning system for heating or cooling, and then blows it out through the vents. The fresh air mode essentially replenishes the cabin with fresh air, improving the air quality inside. It is particularly useful for defrosting in winter or defogging in summer, as the air drawn from outside has higher oxygen content and is drier, making it more effective for these purposes. 2. Recirculation Mode: This mode draws air from inside the vehicle, creating a circulation of air within the cabin. The primary function of the recirculation mode is to effectively block external dust and harmful gases from entering the car. It helps warm up the car faster in winter, cool down more quickly when the AC is on in summer, and can also be used during smoggy conditions. Essentially, the recirculation mode maintains the cabin temperature more efficiently by circulating the existing air inside the car.
I've always thought that using the recirculation mode with the AC is most appropriate, because it only circulates the air inside the car without drawing in hot outside air, allowing the AC to cool down faster. This effect is especially noticeable on scorching summer days when the car has been baking in the sun. However, it's important to remember not to keep the recirculation mode on all the time, otherwise the air can become stale and stuffy, which may cause drowsiness. Through years of driving experience, I've found that it's best to use recirculation for the first few minutes after starting the AC to cool down quickly, then switch to fresh air mode once you feel cool enough. This is particularly comfortable on highways or roads with good air quality. When stuck in traffic or passing through polluted areas, keep the recirculation mode on to prevent exhaust fumes from entering. Occasionally cleaning the AC filter is also recommended to prevent dust buildup. Overall, this approach is both efficient and healthy, with proper switching being the key.
When taking my family car out with the kids, I first activate the air recirculation mode when turning on the AC to quickly cool down the cabin temperature, protecting the children from external heat. The recirculation mode is highly efficient, energy-saving, and practical. However, prolonged use can lead to CO₂ buildup, affecting breathing comfort, so I switch to fresh air mode once the temperature stabilizes to maintain air freshness. In urban driving or during hazy days, I use recirculation more often to protect our health; in suburban areas, I switch to fresh air for a cleaner environment. Regular cabin air filter replacements prevent odors—simple habits for safer driving. After all, family trips prioritize safety, and flexibly choosing between recirculation and fresh air modes is considerate.
