Is it safe to sleep in a car with the engine running and the air conditioning on?

[LaPaisley]

There are significant risks associated with sleeping in a car with the engine idling and the air conditioning on. It is unsafe for your health because the air inside the vehicle cannot circulate properly. If carbon monoxide from the engine leaks into the cabin, it can gradually accumulate, increasing its concentration and leading to poisoning. There have been many cases where people fell asleep and never woke up. Additional information: 1. The button to activate the internal air circulation: The first button is for activating the internal air circulation. As the name suggests, internal circulation means the air inside the car is recirculated. When the internal circulation button is pressed, the vehicle closes the external ventilation ducts, and all air circulation inside the car becomes internal, blocking outside air. The primary purpose is to prevent polluted external air from entering the cabin, keeping the air inside fresher. Another function is to help maintain the interior temperature of the car. 2. The button to activate the external air circulation mode: The second button is for activating the external air circulation mode. When this mode is enabled, air flows between the inside and outside of the car, providing ventilation. This helps expel stale air, such as carbon dioxide, from the cabin and brings in fresh air from outside.