How does the air recirculation in car AC work?

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Also, is it safe to use the feature for long time? If the air inside the car is always recirculated, won’t it be saturated with carbon dioxide as we breath?

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Anonymous 0 Comments

If cars were sealed to the point that one could suffocate themselves by not opening a window, it would be difficult to open your door, and then when you closed it your ears would pop.

Setting the HVAC (Heating, Ventilation and AC) in your car to recirculate just means it will draw the majority of the air it is using to either heat, cool or ventilate the car from the cabin instead of just at the base of your windshield outside. This helps in certain situations. Mostly it’s good for when you’re using your AC because it reduces the ambient temperature of the incoming air, making chilling it easier for you system. It’s also good for when you’re behind a truck or some ‘bro’ rolling coal to stop the fumes from being drawn into the cabin of your car. Also on particularly humid days it can be used to speed up the defogging of your windshield (carry a shower squeegee for this in your car as well, you’ll thank me come this fall/winter), and any day with a pollen index warning to stop that from being drawn in. Other than those situations it’s fine to use either setting.

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