Why Can't You Sleep in the Car with the Air Conditioning On?

1 Answers
LaBrianna
07/24/25 4:52pm
Sleeping in the car with the air conditioning on carries the risk of poisoning. Here are the specific reasons: 1. Risk of carbon monoxide poisoning: If there is no wind, carbon monoxide can accumulate around the car, and the concentration increases over time. At this point, if the car is set to external air circulation, a large amount of carbon monoxide from outside could be drawn into the car, leading to carbon monoxide poisoning. 2. Risk of unconsciousness and brain hypoxia: If the windows are tightly closed and the air conditioning is set to internal circulation while sleeping in the car for a long time, the confined space of the car means that human breathing will cause the oxygen inside the car to decrease, while the exhaled carbon dioxide will increase. When the concentration of carbon dioxide in the car reaches a certain level, a person may experience unconsciousness and brain hypoxia, which can be fatal in severe cases.
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