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Prevent harming your health using air conditioning: Avoid overcooling and switch it off occasionally

Prevent harming your health using air conditioning: Avoid overcooling and switch it off occasionally

During hot summer days, car air conditioning systems are often running at full blast. Not only do they enhance comfort, but they also contribute to road safety. However, improper use of A/C can pose health risks. So how can you avoid these problems—and when and why should you turn the system off?

8. 7. 2025 Lifestyle

Today, air conditioning is a standard feature in most vehicles. Still, not every driver knows how to use it properly to avoid unpleasant issues like colds, sore throats, or burning eyes caused by drastic temperature differences.

 

It all starts with setting a reasonable temperature. “It’s recommended that the difference between the inside and outside temperatures should not exceed 5 °C,” explains Jana Parmová, head physician at the Škoda Medical Centre. So, if it’s 31 °C outside, the A/C should be set to no lower than 26 °C. Of course, individual preferences, needs and tolerances may vary, but this guideline helps keep things safe and healthy.

 

Řepka
Jana Parmová
Škoda Polyclinic

A bit of patience pays off. “When you get into a hot car, don’t switch on the air conditioning immediately. Let the cabin ventilate naturally first,” advises Parmová. Open all the doors briefly or roll down the windows during low-speed driving. This helps avoid thermal shock from a sudden blast of cold air. Toward the end of your drive, gradually raise the cabin temperature so the transition to outdoor heat feels less abrupt.

Benefits of air conditioning  

The health risks of air conditioning stem from improper use. But it is beneficial in itself. Cooling the interior improves the driver's concentration, children are not at risk of overheating in traffic. Modern cabin filters and air recirculation create a cleaner environment in the car, which helps not only allergy sufferers, but everyone in polluted cities, for example.  

The air conditioning also comes in handy in winter. It dries out the air, so if you bring snow (and therefore a lot of moisture) inside, for example on your shoes and clothes, it will help combat window fogging. That's why it's a good idea to leave the air conditioner on automatic mode all year round.

Let the automatic mode do the work

The most widespread and sought-after feature today is the so-called automatic air conditioning, or automatic climate control, which has been commonplace in Škoda cars for many years. In this case, the temperature and basic airflow parameters, such as the speed or the distribution between the individual blowers, are controlled by smart sensors.
 
Ideally, let the system do its job. It evaluates interior conditions and adjusts cooling intelligently and accordingly, even factoring in details like the sun’s direction—since one side of the car heats up more. With just one button press, you can enjoy a comfortable and healthy environment without micromanaging settings.

Aby klimatizace neškodila: nechlaďte příliš a občas ji vypněte

Be careful with manual settings

Of course, every driver has their own preferences, and in some situations even those with automatic climate control may choose to adjust settings manually. In vehicles with mechanical A/C controls, finding the right airflow requires manual adjustment. In addition to setting the basic parameters, directing individual air vents properly can also make a big difference in achieving a comfortable cabin temperature.

Aby klimatizace neškodila: nechlaďte příliš a občas ji vypněte

How to use air conditioning safely

1. Ventilate the cabin before turning on A/C—open all doors briefly or roll down the windows while driving slowly. 
2. Set a temperature no more than 5 °C lower than the outside air. 
2. Use automatic settings whenever possible. Don’t close the vents; aim airflow at windows and the upper cabin area. 
4. Gradually increase cabin temperature when nearing your destination to avoid a shock when exiting. 
5. Turn off the A/C a few minutes before arrival to reduce moisture and prevent mold buildup.

“The best vent setup is with outer vents aimed at the side windows and central vents directed upward,” says David Svítil from Škoda’s Aerodynamics and CFD Simulations team. “That way, you cool or heat the areas around windows—your main heat exchange zones—while also sending air to the rear seats.” 

Parmová confirms this from a medical perspective as well: “It’s important to direct the airflow so it doesn’t blow straight at your face. Aim it at the windshield or upward, so the air can circulate evenly throughout the cabin,” she advises—helping drivers avoid catching colds and other health issues caused by direct exposure.

Aby klimatizace neškodila: nechlaďte příliš a občas ji vypněte

According to Svítil, it’s not effective to close the vents altogether, redirecting the airflow is a better approach. If the cold air feels uncomfortable, simply point the vent in a different direction. This allows the cabin to cool more efficiently than if the airflow is shut off completely. It also helps in situations where the windows might start to fog up. 

Don't forget about maintenance

Like any other part of the car, your A/C system needs regular care. “Clean and disinfect the air conditioning system at least once a year, and check the cabin filter condition,” Parmová advises. Moisture can accumulate in the system, potentially leading to mold growth. You can reduce this risk by turning off the A/C manually a few minutes before shutting off the engine—this lets the system dry out. Also, use high-quality filters, ideally original Škoda Auto parts or those from authorized service partners. 

And don’t forget about yourself: air conditioning dries the air, so stay hydrated. If you notice symptoms like dry eyes, sore throat, or stiff muscles, you may need to adjust how you use the A/C—or seek medical advice if the symptoms persist. Addressing minor issues early can help prevent bigger problems down the road.

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