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Positive Air Pressure - What you need to know to keep your PC clean and happy! - Page 3

post #21 of 33
Could you not also hold some toilet paper to an area of the case with vent holes (but no fan) and see if it blows out or in?
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post #22 of 33
Quote:
Originally Posted by LtStinger View Post

Could you not also hold some toilet paper to an area of the case with vent holes (but no fan) and see if it blows out or in?


See item 2 in my sig.

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post #23 of 33
Quote:
Originally Posted by LtStinger View Post

Could you not also hold some toilet paper to an area of the case with vent holes (but no fan) and see if it blows out or in?

Sure if there is enough flow/velocity to move it.
post #24 of 33
Quote:
Originally Posted by ehume View Post



See item 2 in my sig.

I read through it. The guy that said that it's not negative pressure I was going to side with at first. After thinking about it and looking at it again, I realized he's wrong. Just because there are huge holes and openings in the case doesn't make negative pressure impossible. It just makes it harder. Stand at a doorway and blow as hard as you can, and you won't move a lot of air in from the open window behind you. Start one of the gas-powered ventilation fans off my firetruck and set it up at the doorway and you have yourself a negatively pressured room.

Your picture shows a simple concept. That concept being that those fans are pretty awesome.
Quote:
Originally Posted by AMD4ME View Post

There should not be any need for six fans. Two or three is usually plenty. Do you have a fan fetish? wink.gif

Yes, he does. I've been following that donkey avatar for a while now, this guy knows his fans. Thanks to him I can lay on my deathbed knowing that hours upon hours of my life have gone into an extreme knowledge collection of computer fans.
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post #25 of 33
Quote:
Originally Posted by ehume View Post

I believe in positive flow, not positive pressure. Positive pressure can cause stagnation and impair cooling.

I'm a big fan of adding a 5.25 bay front intake fan, cutting out the rear grill, leaving off the rear slot covers and even removing the rear slot pillars. On my case I have six filtered intake fans (all under 1000 rpm) and zero exhaust fans. Air just leaves the case quietly.

a some what noisy intake but a quiet, noiseless outtake... hmmm


lol, btw thats not a donkey
it's from My Neighbour Totoro
it's a totoro
Edited by SirWaWa - 2/26/12 at 8:52am
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post #26 of 33

BTW -- if anyone has not yet seen My Neighbor Totoro, that film is the reason Studio Ghibli was formed. It is remarkable and magical. And the story is finished in the end credits, winding it all up in a beautiful fashion (you might miss it if you don't look carefully).

 

Do not deprive yourself of this gem.

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post #27 of 33
Running positive pressure is just easier to control dust levels. The only intake is where the fan is and thus only one place for dust to enter. Put a filter on every fan and the case will remain dust free. This is how cabinets on computer-controlled machines are setup.
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post #28 of 33
Quote:
Originally Posted by Cavi Mike View Post

Running positive pressure is just easier to control dust levels. The only intake is where the fan is and thus only one place for dust to enter. Put a filter on every fan and the case will remain dust free. This is how cabinets on computer-controlled machines are setup.

Exactly.
post #29 of 33
Thread Starter 
I have to agree 100%. The easiest (and most cost effective) method I have found to control the dust situation where intake fans are concerned is to buy a roll of air filtration material (such as Flanders PrecisionAire HR36240) and custom cut it to fit your case fans. For instance, I have a Corsair 600T, and I basically cut the material to fit the removable grilles. In this instance, it is virtually impossible for dust to enter the enclosure since the filtration material substantially overlaps the fans intake areas.

I do the same thing on my Silverstone FT02 as well. That case contains three 180mm intake fans on the bottom, and I simply cut a piece of the filter material which slides into the air intake area. It's very easy and works much better than the stock "filters" that Silverstone or Corsair includes with their cases.

For about $17.00 you really can't go wrong. You get 20 feet of the stuff which will last a long time. Plus, it also happens to be the same stuff I use as filtration material for my central air system in my home, so really, I'm killing two birds with one stone, LOL!

Flanders PrecisionAire Hammock Style filtration material - HR36240
http://www.amazon.com/gp/product/B000LNP7IG
Edited by garetjax27 - 2/27/12 at 7:24am
post #30 of 33
Quote:
Originally Posted by garetjax27 View Post


I do the same thing on my Silverstone FT02 as well. That case contains three 180mm intake fans on the bottom, and I simply cut a piece of the filter material which slides into the air intake area. It's very easy and works much better than the stock "filters" that Silverstone or Corsair includes with their cases.

interesting. do you use any kind of framing for the filters? or does it not collapse under the static pressure of the AP181's? I've been trying to find better filter material for my FT02, but was worried the static pressure and the surface area of the filter would cause it to collapse onto the fan blades and cause rubbing noise from the filter hitting the fan blades. also do you have any problems sliding the filters in and out of the filter holder of the FT02, i would think it's gonna be tough trying to slide a unframed filter into a space that thin?

if possible can you post some pics of your implementation? inquiring minds want to know smile.gif
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