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Is it okay to sleep in the car without opening windows or turning on the air conditioning?

1 Answers

MatthewFitz

07/29/25 6:49pm

Cars are not completely airtight, so it's possible to sleep without opening windows, but it is essential to turn off the engine. It is recommended to open windows for ventilation when sleeping in the car, as keeping them closed can make the interior stuffy and hot. To avoid suffocation and oxygen deprivation, opening windows is the safest option, but remember to turn off the engine to prevent potential poisoning. Additional information: 1. How to sleep in the car: It's best to open the windows when sleeping in the car. Many people traveling by car inevitably sleep in their vehicles, and most owners leave a window or the tailgate slightly open for ventilation. To avoid inconvenience during rain, some install window deflectors, allowing a small gap for airflow even in wet weather. 2. Effects of sleeping with windows closed: Closed windows can make the interior uncomfortably hot depending on the weather. Always turn off the engine when sleeping in the car, as insufficient air intake when the car is stationary leads to incomplete combustion in the engine, releasing harmful gases. Inhaling these gases can cause symptoms ranging from dizziness and vomiting to severe poisoning or even death. Therefore, always shut off the engine when sleeping in the car. 3. Choosing a location: When sleeping in the car, park in a safe area without obstructing traffic. In remote locations, ensure the doors are securely locked.

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