Noob question....

TacoRick said:
It also stops outside air from coming through the vents when the AC is off.
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True... i took that for granted, but sometimes ppl do say "why cant i stop air from coming thru vents when the fan motor is off"?

Then u explain the recirc button and it makes the difference.
 
Well, let's not get too excited about a recirc button. It recirculates air, that's true, but it does not stop outside air from coming in. There is always outside air being ducted into the vehicle regardless of the ventilation setting. With the recirc button on, you get a lower percentage of outside air coming in.
 
WiskyT said:
Well, let's not get too excited about a recirc button. It recirculates air, that's true, but it does not stop outside air from coming in. There is always outside air being ducted into the vehicle regardless of the ventilation setting. With the recirc button on, you get a lower percentage of outside air coming in.
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Splitting hairs.
We must be talking about nanohootmeters of airculations
 
slowpoke said:
Splitting hairs.
We must be talking about nanohootmeters of airculations
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Wrong. A significant amount of outside air is deliberately brought into the cabin no matter what settings you use. This is all vehicles. It is not splitting hairs.
 
WiskyT said:
Wrong. A significant amount of outside air is deliberately brought into the cabin no matter what settings you use. This is all vehicles. It is not splitting hairs.
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U cant feel it. Recirculate off, and u can feel it.

Unless u have some super sensitive skin and shouldnt be out in the daylight.

Mitosis of folliculars.
 
I'm going to explain this one more time and then everyone is free to believe whatever they want. The fresh air circulation is designed into the vehicle by engineers to deliberately accomplish outside air exchanges to reduce carbon DIOXIDE buildup in the cabin. That is not a typo, its CO2 from human breath that builds in the cabin and causes drowsiness.

The fresh air doesn't need to be blowing out of the vents and be palpable on your skin. There are vents in high pressure areas to allow outside air in and low pressure areas to let stale air out to accomplish this. It is going on whether you are aware of it or not.

The recirculate feature decreases the PERCENTAGE of outside air coming in the vehicle, it doesn't eliminate it. After about 30 minutes or so in a sealed vehicle with 3 or so occupants, the CO2 level rises to the point of causing drowsiness. That is why your vehicle allows outside air in, because your next trip to Wally World with the family would likely end up in a ditch.

There is debate on which is healthier, recirc or not. With recirc, you reduce the particulate inhalation from the pollution of the other vehicles on the road, but with more than one occupant, the CO2 levels can still rise to unacceptable levels. So, car companies have different views on what the percentages of outside vs inside air should be and design their ventilation systems differently.

Next time you are driving with your recirc button on, ask yourself why you can smell the chicken truck in front of you.
 
WiskyT said:
I'm going to explain this one more time and then everyone is free to believe whatever they want. The fresh air circulation is designed into the vehicle by engineers to deliberately accomplish outside air exchanges to reduce carbon DIOXIDE buildup in the cabin. That is not a typo, its CO2 from human breath that builds in the cabin and causes drowsiness.

The fresh air doesn't need to be blowing out of the vents and be palpable on your skin. There are vents in high pressure areas to allow outside air in and low pressure areas to let stale air out to accomplish this. It is going on whether you are aware of it or not.

The recirculate feature decreases the PERCENTAGE of outside air coming in the vehicle, it doesn't eliminate it. After about 30 minutes or so in a sealed vehicle with 3 or so occupants, the CO2 level rises to the point of causing drowsiness. That is why your vehicle allows outside air in, because your next trip to Wally World with the family would likely end up in a ditch.

There is debate on which is healthier, recirc or not. With recirc, you reduce the particulate inhalation from the pollution of the other vehicles on the road, but with more than one occupant, the CO2 levels can still rise to unacceptable levels. So, car companies have different views on what the percentages of outside vs inside air should be and design their ventilation systems differently.

Next time you are driving with your recirc button on, ask yourself why you can smell the chicken truck in front of you.
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Well spoken
 
Its pretty obvious the cabin isnt air tight, as soon as u get in the vehicle. Imagine trying to close the door. Besides, ther3s a massive vent behind the back seat.
Keep **** simple, the guy just asked wtf the button did. Now, if u insist on getting into some concrete thinking rattle trap, do it right.

Give us documentation, and the math to show EXACTLY the amount of air leaking into the cabin when the recirc button is on.

Christ man, u sound like an engineer.....

Do u argue about the fact that the remote control for your tv or home stereo shouldnt actually have an OFF button because all it does is put electronics into standby mode?

How about a pair of pants should be called a pant (singular), since ppl dont reglularly put on 2 sets of pants at a time.
 
Also please read the manual because the info is there but don't push the button because you will die like everyone else on the road that has a recirculation button in their vehicle.

My Ranger defaulted to recirc when you turned the HVAC system off. I didn't die...or maybe I did and went to a noob filled hell. Lol!
 

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