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Positive airflow?

post #1 of 24
Thread Starter 
can someone explain to me how positive airflow keeps dust out of the computer. it does not seem to click with me. the only t hing I can really see is using dust filters to keep dust out but not positive airflow
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compy jr
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post #2 of 24
From what I get of it, dust settles when there isnt enough wind to force it to stay airborne. Soo... if you have positive airflow, which is having a constant flow of air inside and leading outside of your case, then dust hasn't a chance to settle.

Might not be right, but it makes a small amount of sense to me
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post #3 of 24
by positive airflow are you talking about the pressure inside the case? Postitive pressure and Negative pressure?

or is positive airflow just something i havn't heard of?
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post #4 of 24
negative air flow works like a vacuume cleaner by sucking it in and leving it in there
    
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post #5 of 24
so

positive airflow = negative pressure

and

negtive airflow = positive pressure?
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post #6 of 24
To add to duke's statement: positive airflow implies that the case pressure is positive, and that any nooks and crannys that dust may enter from will not pull dust in. The caveat to this is that the intake fans REQUIRE filters as they will bring in the dust.
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post #7 of 24
I was just going to ask this question, glad I found this thread.

We are looking for positive pressure inside that case for optimum cooling? In other words, we want more airflow going into the case than is going out?

Thanks
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post #8 of 24
no you want the opposite

more out than in
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post #9 of 24
thats y exaust fans are better... but if u need the cooling put a pusher in it..

need better cooling.. flip the fan around and pull the air threw the heatsink.. its better for cooling.. and u can put a duct on the fan and put it going straight out.. so thats less heat in the case... put a video card duel slot cooling that puts that directly out the case and now there is hardly any heat in there so a single 120mm fan at a slow speed would be more then sufficent
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post #10 of 24
Thread Starter 
my thinking though is that can fans really produce that much pressure? they seem fairly inefficient as a pressure producer. the only advantage I can see that when doing the fan pushing air in you are controlling where the air comes in and if you use a filter there it would help where when you do the exhaust fan and that is it air can come in from many places requiring more work to seal up then it's worth unless you want to seal off everything to make the air only come in one spot and then filter that. for that might work.

but I don't think it has to with pressure or anything though
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compy jr
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