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post #291 of 2110
Mental exercise: how do you think a case will do if the only air flow into the case comes through filters, with fans exhausting more air from the case than pulling air into it?
    
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post #292 of 2110
Quote:
Originally Posted by BBEG View Post
Mental exercise: how do you think a case will do if the only air flow into the case comes through filters, with fans exhausting more air from the case than pulling air into it?
It would be a vacuum cleaner without the bag. A total dust magnet with tons of stagnant hot air messing with temperatures and logical airflow
    
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post #293 of 2110
Quote:
Originally Posted by BBEG View Post
Mental exercise: how do you think a case will do if the only air flow into the case comes through filters, with fans exhausting more air from the case than pulling air into it?
Quote:
Originally Posted by LtCheese View Post
It would be a vacuum cleaner without the bag. A total dust magnet with tons of stagnant hot air messing with temperatures and logical airflow
LtCheese ninja'd me lul
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post #294 of 2110
through the fans is filters yes, but through the cracks and stuff don't have filters, true it might only be minimal dust, but cases usually always have some gaping holes somewhere lol
   
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post #295 of 2110
Quote:
Originally Posted by chinesethunda View Post
through the fans is filters yes, but through the cracks and stuff don't have filters, true it might only be minimal dust, but cases usually always have some gaping holes somewhere lol
Like?
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post #296 of 2110
Quote:
Originally Posted by BBEG View Post
Mental exercise: how do you think a case will do if the only air flow into the case comes through filters, with fans exhausting more air from the case than pulling air into it?
almost zalman gs1000 cooling -> 3 outake fans and that's all
have to say temperatures were normaln but higher than in raven evolution
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post #297 of 2110
Quote:
Originally Posted by LtCheese View Post
It would be a vacuum cleaner without the bag. A total dust magnet with tons of stagnant hot air messing with temperatures and logical airflow
I don't see how this is logical at all. If you seal up the case so the only air flowing into or out of it goes through fan mounts, and the only ways in are filtered, dust would be a nonissue and it shouldn't be any more dusty than a case with fans pulling more air in than exhausting it out.

My main curiosity is what air flow looks like; I was not a physics student and thermodynamics is a wee bit outside my scope of education.
    
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post #298 of 2110
well for me i have gaping holes around my side fan because its on the outside and no mesh to cover it, so areas with mesh are dust magnets, PCI slots? 5.25" drive bay areas are also areas where dust can get in
   
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post #299 of 2110
There are several effective ways of sealing off the case (electric tape, oversized filters, etc.), but you're getting caught up on the minutia. Assume you've already figured out a way to completely seal the case except for fan mounts.

If one can accomplish the same dust-free environment as 'greater intake than exaust' setups but with fewer fans, then the idea is definitely worth thinking about.
    
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post #300 of 2110
Thread Starter 
There are ways to buy and build filters for the side panel. I'll take a picture of mine the next time I take my rig down to the basement.

If you can truly seal each and every place where case panels join together, each spot, where air might go in, then you can have a negative pressure rig with minimal dust collection. But look at this:



That's an intake fan in the top of my 5.25 bay. When I pulled the front fascia off I found dust on that fan. I now have filters over my IO plate because the dust got through all those little slots.

Everywhere else my fans are fully filtered. I have only those filtered intake fans and no exhaust fans. I get far less dust that way. I recommend the practice.

You can see my current airflow by clicking on my username (over the avatar) and selecting View Public Profile.
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