Drivers advised on safe car air-conditioning use to avoid health risks and fines

Car air‑conditioning itself does not harm health, but incorrect use can cause rapid temperature shocks, headaches, neck pain, joint discomfort and respiratory irritation, especially for children, seniors and immune‑compromised people. Experts recommend ventilating a hot vehicle first, then turning on the AC, and keeping the interior temperature about 5‑7 °C lower than the outside temperature, never exceeding a 10 °C difference. Cold air should be directed upward toward the windshield or side windows rather than straight at the face or neck.

Running the engine solely to cool the cabin while the car is parked increases fuel consumption, emissions and noise, and in several European countries – Austria, Italy, Switzerland and Denmark – may attract fines for unnecessary idling. Slovakia has no specific ban on AC use in parked cars, but drivers are still urged not to let the engine run longer than needed. The most efficient method is to open doors or windows briefly, drive with them slightly open, and engage the AC after the vehicle is moving. Regular cleaning of the AC system and replacement of cabin filters are also advised to prevent bacterial growth and unpleasant odors.