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I'm sure you know that this button is recirculation. So what it does,
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it closes the flap of the climate system that takes air from the outside. So if you activate
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the recirculation function, your climate system will only take the air from the inside of your
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car to warm it up in the winter or to cool it down in summer when you use the AC. And in most cases,
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you want to keep this recirculation function off so you want to take fresh air from the
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outside of your car. Because if you close it, if you use your recirculation for a long time,
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you will breathe out all oxygen in your car. Like, it's not sealed, so you will still get
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some air from outside but a little air, and so you want to keep it off to get some fresh air
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in order to breathe some oxygen. But there are at least four ways to benefit from the recirculation
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function. And the first obvious thing is that you can activate the recirculation function
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when something stinks outside of your car. So when you feel some bad smell, you can activate
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immediately the recirculation, and your car will stop taking the stinky air from outside,
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and you will breathe the air which is inside, which doesn't stink that much. And after you
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pass this area where the air is stinky, you can deactivate the system and take some fresh air from
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outside. And the second thing, which is really helpful, when it's really hot in the summer:
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you want to activate this recirculation function when you turn on the AC and it's hot outside. It
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means that all the air that is cooled down by your AC will be cooled down again and again and
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again. It will not take the hot air from outside; it will not try to cool it down. And in this case,
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it's like five times faster, your car will be cooled down. You can make sure that in most cars
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it will work automatically even if you don't want to activate this system. So you need to activate
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the AC, and you see that if you are in auto mode, so your automatic climate system decides what to
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do, your recirculation is automatically on. And if you turn it off, you don't have auto mode, and if
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you again press auto mode, this system activates automatically. So let's check. If I raise the
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temperature in my automatic climate system, it will turn the system off at some point. I will
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raise it, and you see when it's 27° C the function is off. And if I make it again to 20, the function
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is automatically on. So what it shows, it shows that the brain of your car is pretty smart, and
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it knows that if it activates the recirculation function, it will cool down the interior of your
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car faster. So you can use this if you are on a hot day sitting in your car. The first thing
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you want to do is to open all windows and let some cooler air come inside because in your car it may
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be like plus 60° C. I don't know in Fahrenheit, but it's a lot. And then when you cool down the
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interior of your car, you close the windows and turn on the AC and turn on the recirculation even
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if it doesn't turn on automatically in your vehicle. And after a minute or two, you will
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start feeling that you're getting cold air in your car. If you don't turn on recirculation,
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it will take you like several minutes to start feeling the effect of AC work. But it's not all.
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So the third thing, the third situation when you want to use the recirculation button is when it's
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very dusty outside. So what happens when it's very dusty? You don't get this dust inside your
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car because you have a filter that is mounted somewhere in the air intake, cabin air intake,
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and this filter will hold all this dust. But this filter will have to be replaced after that,
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and you don't want to spend your money on that. So what you want to do, if you have a lot of dust
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outside, you want to turn on the recirculation function, and this dust just will not come into
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your car. It will not come to the filter because the flap that closes the air intake will not allow
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this dust to come to the filter, and this way, you will save your money because this filter shouldn't
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be replaced like every year. It's once every 3 years or something like that, depending on your
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car and depending on what the manufacturer says in the driver's manual. And then the fourth important
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thing is that if you're allergic to something and you know that you're driving through an area
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that has a lot of these plants, for example, you just want to turn on the recirculation function,
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and you will not protect yourself completely from some allergic elements to come into your car, but
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you will get way fewer chances to get the allergy when you're driving. But there is one important
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thing: avoid using your recirculation function for more than 1 hour. In this case, you will not have
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enough oxygen in your car, your windows may start fogging, and you may even experience headache or
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something like that. So don't use this function for more than 1 hour. And additionally, it's not
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recommended to use this function a lot in winter and autumn when you have a lot of rains and snow
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because your windows will be absolutely fogged. When you activate the recirculation function. You
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need some fresh air from outside to help you dry the windows and see the cars around you.
