We all know how uncomfortable it can feel when the air inside a car seems stuffy, or the cabin feels heavy after driving for a while.

Surprisingly, this often happens because we haven’t set the car’s air circulation properly. Today, let’s take a closer look at how we can use internal and external air circulation to keep our rides fresh, safe, and comfortable.

<h3>Understanding Air Circulation Symbols</h3>

The first step is to know what the internal and external circulation symbols look like. Each car might place the buttons differently, but the symbols themselves are universal. By recognizing these icons, we can easily switch between modes and make sure our car is breathing the right air.

<h3>Why Circulation Matters</h3>

Many drivers tend to keep windows tightly closed, especially when it’s cold outside. Yet, while driving in busy city streets, the cabin can quickly fill with exhaust fumes. On the open road or highway, we sometimes feel dizzy or short of breath. Both situations are caused by not using internal and external circulation properly. Using the right air mode not only makes the ride more comfortable but also protects our health from polluted air.

<h3>External Circulation: Bringing Fresh Air In</h3>

When the fan is on, we can choose either external or internal circulation. External circulation draws fresh air from outside into the car, keeping the cabin ventilated. Even if the fan is off, driving naturally moves outside air into the car. You might notice airflow even with the fan off—that’s external circulation at work. However, in traffic jams, using external circulation can fill the car with exhaust fumes from other vehicles, so we need to be careful when to use it.

<h3>Internal Circulation: Blocking Polluted Air</h3>

Internal circulation closes off the air path between the car interior and the outside. With the fan on, the air only circulates within the cabin, preventing outside dust, pollutants, or harmful gases from entering. This is especially useful in traffic jams, tunnels, or dusty roads. Another benefit is temperature control: internal circulation helps retain warmth during cold weather, making the cabin feel cozier.

<h3>When to Use Each Mode</h3>

So how do we decide which mode to use? Here’s a simple guide:

- Traffic jams or tunnels: Use internal circulation to block exhaust fumes.

- Highway or open road: Switch to external circulation to enjoy fresh air.

- Summer air conditioning: Keep internal circulation on for better cooling, but occasionally switch to external for fresh airflow.

- Winter heating: Internal circulation keeps the warmth inside, but opening external circulation briefly can avoid stuffy air.

<h3>Practical Tips for Everyday Driving</h3>

Many city drivers spend most of their time in traffic. During rush hours, especially in tunnels, we should stick to internal circulation. Once the car reaches a normal speed and the air is clean, external circulation is best to refresh the cabin.

On dusty roads, don’t forget to close the external circulation while keeping windows shut. Even when parked, internal circulation helps reduce dust accumulation inside the car, as external circulation can let in airborne particles.

<h3>Common Mistakes to Avoid</h3>

A frequent complaint in summer is that the air conditioner doesn’t cool effectively. Often, this happens because the car is accidentally set to external circulation, letting hot outside air constantly flow in. To get the best cooling, we should use internal circulation. Conversely, if it’s mildly warm and we just want light airflow, switching to external circulation adds fresh air without losing comfort.

<h3>Make Your Car a Healthy Space</h3>

By learning when and how to use internal and external circulation, we can protect ourselves from harmful gases, enjoy fresh air, and feel more comfortable on every drive. Next time we get behind the wheel, let’s pay attention to the air settings. Our car cabin can be a refreshing, safe, and cozy space—if we use the right mode at the right time.

Lykkers, remember: small adjustments like switching air circulation can make a big difference for our comfort and safety every day. Let’s breathe smart and drive happy!