Is It Safe to Sleep in a Car with the Heater On in Winter?
1 Answers
It is not safe to sleep in a car with the heater on in winter, for the following reasons: 1. When the engine is running, incomplete combustion of fuel can produce high concentrations of carbon monoxide. While the car is moving, the air convection through the air conditioning system keeps the carbon monoxide concentration inside the car low; 2. When the car is stationary but the heater remains on with the windows closed, the carbon monoxide emitted by the engine can accumulate and increase in concentration. Therefore, it is best not to sleep in the car with the heater on when parked; 3. In winter, many car owners keep the windows tightly closed and the heater running for extended periods to maintain warmth inside the car. While this ensures a comfortable temperature and protects against the cold, it can also easily lead to air pollution inside the vehicle.