MBP fans blow air in or out?

Discussion in 'MacBook Pro' started by RichL, Dec 4, 2007.

  1. RichL macrumors 6502

    Joined:
    Jun 15, 2007
    Location:
    Chicago
    #1
    Simple question. Do the fans blow the air in or out of the case?
     
  2. cptpower macrumors regular

    cptpower

    Joined:
    Sep 10, 2007
    Location:
    Calgary, AB
    #2
    out of course; I'm sure you wouldn't want to have a couple of fans sucking in a bunch of dust particles and whatnot into the chassis of your machine.
     
  3. BigJohno macrumors 65816

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    Jan 1, 2007
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    San Francisco
    #3
    Do you not feel the hot air coming out the back.
     
  4. Sesshi macrumors G3

    Sesshi

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    #4
    To have air coming out of the machine it has to be sucked in somewhere. There are two fans, sucking in air from the top to blow out of the back.
     
  5. hsadear macrumors member

    hsadear

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    Oct 30, 2007
    Location:
    New Zealand
    #5
    i know that with my macbook it comes through the keys and out the back between the screen hinge. might be different for mbp's though
     
  6. anirban macrumors 6502a

    anirban

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    Jan 9, 2007
    Location:
    Houston, TX
    #6
    I agree.

    I most of the laptops that I have seen, there are two fans- one intake fan, and one exhaust. I am willing to bet that there are two fans in the MBP- intake and exhaust.
     
  7. Inconsequential macrumors 68000

    Joined:
    Sep 12, 2007
    #8
    They suck in from the back middle and out at the sides.

    :)


    So each panel at the back:

    Out - Out/In - In - In - Out/In - Out
     
  8. MrT8064 macrumors 6502a

    MrT8064

    Joined:
    Jun 7, 2006
    Location:
    UK
    #9
    the fans suck air in through the keys and speaker grills... (i have tested this by blowing smoke over the top!!) and it comes out under the screen (at the back)

    if you crank up the speed of the fans, you can feel slight air movement.
     
  9. jnc macrumors 68020

    jnc

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    Nunya, Business TX
    #10
    Are you an idiot? :D
     
  10. cal6n macrumors 68000

    cal6n

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    Jul 25, 2004
    Location:
    Gloucester, UK
    #11
    Only if he inhaled...
     
  11. Techguy172 macrumors 68000

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    Feb 2, 2007
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    Ontario Canada
    #12
    Why is he an idiot? He just wanted to see, It doesn't hurt anything.
     
  12. e12a macrumors 68000

    e12a

    Joined:
    Oct 28, 2006
    #13
    you bet wrong. I want my 20 bucks.
     
  13. jnc macrumors 68020

    jnc

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    Jan 7, 2007
    Location:
    Nunya, Business TX
    #14
    I didn't call him an idiot. What do I care what he does to his machine? But nothing beneficial could come from blowing smoke into a machine.
     
  14. Sesshi macrumors G3

    Sesshi

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    Jun 3, 2006
    Location:
    One Nation Under Gordon
    #15
    More of an idiot might be someone who suggests the intake to be adjacent to where hot air is exiting...? Curious does not make for idiocy in my view - although it sometimes makes for expensive accidents :D
     
  15. OllyW Moderator

    OllyW

    Staff Member

    Joined:
    Oct 11, 2005
    Location:
    The Black Country, England
    #16
    You don't need to have fans to blow air in to a computer, the drop in air pressure caused by the fan blowing air out will create a flow of fresh air into the computer.

    Obviously, using fans to blow air in is advantageous, because you have much better control directing the air flow over the crucial components.
     
  16. feyn-man macrumors regular

    Joined:
    Oct 24, 2007
    #17
    What a strange question.
    If the air only go one way, whatever in or out, we can just use the MBP to get a vaccum?:cool:
     
  17. polycat33 macrumors 6502

    Joined:
    Jul 1, 2007
    Location:
    Alexandria, VA
    #18
    There could be multiple fans, some which pull air in, some which pull air out - or there could be fans that only go in one direction, and the question is which. Of course air still comes in, in order for it to be blown back out (or vice versa) but there aren't necessarily fans that do both in and out.
     
  18. Sesshi macrumors G3

    Sesshi

    Joined:
    Jun 3, 2006
    Location:
    One Nation Under Gordon
    #19
    I am amazed at the discussion such a topic can spawn.

    AS I said, there are two fans in the MBP. One for the CPU assembly, one for the GPU assembly. The airflow is top > rear.
     

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