In summer, the temperature inside a car parked in the sun can far exceed the outside temperature, making it unbearable and even dangerous to stay inside the vehicle.
This excess heat not only affects the well-being of those inside the car, but can also increase the risk of accidents, since high temperatures can affect the driver’s ability to concentrate and react.
To reduce the temperature inside a car there is an effective and quick method, known as the Japanese trick. It consists of lowering the passenger window completely and then opening and closing the driver’s door several times – usually five – with force. This process creates a pump effect that expels the hot air accumulated inside the vehicle.
By doing so, colder air from outside enters the car while warm air escapes, thanks to the pressure difference created by the opening and closing of the door. This is a simple and effective method that does not require additional equipment or significant energy consumption, unlike the use of air conditioning.
Although this trick can be very useful in situations where you need a quick solution to reduce the interior temperature of the car, it should be kept in mind that its effectiveness may vary depending on the outside temperature and direct exposure to the sun.
Furthermore, it is important to keep in mind that this method does not replace normal precautions, such as using sunshades on the windows, parking in the shade or keeping the vehicle’s air conditioning system in good working order.
