Is it okay to run the air conditioning for 3 hours while parked?

[StArya]

It is not advisable to run the air conditioning for 3 hours while parked. Doing so not only affects the lifespan of the engine and battery but can also have adverse effects on human health. If you need to rest while parked, it's best to partially open the windows to ensure proper air circulation inside the vehicle, provided it's safe to do so. Here are the reasons why running the air conditioning for too long while parked is not recommended: Reason 1: Prolonged use can lead to poor heat dissipation, which can damage the vehicle's engine. Reason 2: In a relatively enclosed environment, such as a garage, there is a risk of carbon dioxide poisoning. It's best to run the air conditioning in an open or well-ventilated area and leave a small window gap for ventilation. Reason 3: If possible, avoid using the air conditioning altogether to save energy and protect the environment, benefiting both the country and yourself.

[ArthurAnn]

Once during summer, I parked my car and turned on the AC to escape the heat, only to find the battery completely drained after 3 hours, almost leaving me unable to start the car. Since then, I've learned that running the AC for 3 hours while parked is highly discouraged. This is because the AC relies on the engine running to supply power, and prolonged idling can cause the engine to overheat, consume more fuel, and potentially damage the battery. If you absolutely must do this, such as when resting outdoors, it's advisable to turn off the AC every half hour to let the engine rest and open the windows for ventilation to prevent carbon monoxide buildup. It's best to avoid doing this in garages or enclosed spaces to minimize poisoning risks. For everyday situations, running the AC for 10-15 minutes is acceptable, but exceeding an hour is unnecessary. Instead, using a sunshade and parking in a shaded area is a more economical and practical solution.

[StLeah]

I must emphasize that safety comes first. Leaving the car parked with the air conditioning on for 3 hours is absolutely dangerous. I've seen news reports of carbon monoxide poisoning accidents, especially in garages or enclosed spaces where the risk is even greater. If the engine is running and the exhaust system isn't properly vented, the gas can be drawn into the car and prove fatal. My suggestion is that if you must take a temporary break, turn off the air conditioning after half an hour and open the windows to ensure fresh air circulation. Additionally, doing this frequently can shorten the battery life and waste gasoline, increasing expenses. Remember, safety is more important than comfort—it's best to plan ahead for ways to stay cool.

[EmilyFitz]

I think idling with the AC on for 3 hours is too wasteful of fuel and pollutes the environment. It's estimated that idling consumes about 0.5 liters of fuel per hour, so 3 hours burns quite a bit of expensive fuel and emits more exhaust. Especially in cities, it pollutes the air and isn't eco-friendly. It's better to bring a fan or park in the shade to save money and be green. Of course, it's fine for short emergency periods under 10 minutes, but making it a long-term habit is bad for both the car and the planet. We should promote low-carbon living starting with small actions.