Air Recirculation

Discussion in 'Electronics' started by jryans10, Aug 30, 2011.

  1. jryans10

    jryans10 Member

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    Hi,

    Just got a couple of questions about air recirculation (air from inside the car rather than outside):

    1) Is it bad to always use it? I know it may steam up your windows but apart from this, is there any bad reason why I shouldn't use it such as if it is damaging to the car?

    2) Where exactly does the air come from inside the car?

    Many thanks,
    - John.
     
  2. rf065

    rf065 MB Enthusiast

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    It just seals any outside fresh air from entering the car and recirculates the air already inside. Can also heat the interior quicker in winter. Great for when there are fumes outside, but eventually the air will become stale. Mine is always set for fresh air.
     
  3. Benzster

    Benzster Active Member

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    Air-recirculation is jolly useful if you get behind a 'dirty diesel' exhaust or if travelling through a road tunnel under a large river. However, once the immediate problem is over, I'm always back to 'fresh air.' Air-recirculation does however, revert back to fresh air automatically after a period of time...5/10 mins+/-.
     
  4. markjay

    markjay MB Master

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    On my w203, if you remove the cabin filter (on top of the battery in the engine compartment) you can see the air intake for the cabin air circulation system, and it has a flap that simply closes when the air circulation switch is pressed. Interestingly, setting the temperature knobs all the way to either extreme end - hot or cold - also causes the flap to close, even if the switch is not pressed - presumably this allows for faster cooling/warming of the cabin.
     
  5. rf065

    rf065 MB Enthusiast

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    If you press & hold the recirculate button on the CLK, it also closes the windows & sunroof if open. If you press & hold it again, it returns the windows & sunroof to their original positions.

    Russ
     
  6. Ted

    Ted MB Enthusiast

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    One downside of recirc is when you have consumed a bhuna the previous evening.


    As others have said, the air will become stale if left on recirc.
     
  7. camerafodder

    camerafodder MB Enthusiast

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    This can be fun too if you have ventilated front seats. Well for the people in the front anyway, not the poor sods in the back! :D
     
  8. OP
    OP
    jryans10

    jryans10 Member

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    Joined:
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    Location:
    Bristol
    Car:
    Mercedes-Benz A140
    Thanks folks. I noticed that (because I'm currently on holiday in the Philippines) they use air recirc all the time due to the heavy pollution. Just wondering, will this have the same effect as using it in the UK or does the air recirc work slightly differently to allow it to be on all the time? I'm guessing they are all the same.

    Many thanks.
     

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