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Exhaust Fan

post #1 of 7
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just bought a new exhaust fan..question is i know its supposed to pull the air out of the case..but i was experimenting and put the fan in the other way so its blowing in cool air..and my temps are in the mid-high 20's celcius and mid 30s on load so pretty good..my case has a vent on the side so air can still get out..but should i still flip the exhaust fan around so it pulls out the hot air?


thanks
post #2 of 7
You may end up with backpressure in your case. If you have all the air going in, and none coming out, then eventually there will be at least some degree of an air build up. I would say either face all of your fans in and remove the side panel, or put a high CFM blowhole in the top to try to take out air quickly.
    
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post #3 of 7
you should create a river flowing effect with the air from the fans.
    
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post #4 of 7
I've heard that generally CFM in should about equal CFM out for best performance. I think a lot of people see good results when they have all the fans blowing in one direction (with the exception of side fans, of course). But pow3rtr1p makes a good point with the top fan. Hot air rises and a top exhaust can be very beneficial.
    
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post #5 of 7
I'm thinking of modding a case for a 120mm side fan. right now i have 1 x 120mm intake fan and 1x 120mm outflow fan(plus PSU fan which i think stucks in i.e blowing out of bottom of PSU). SO i'm going to install the side fan as a outflow, even though i really only have 1 intake fan.


Also i'm moving in with friend that has lots of dogs/cats, which means lots of dog hair. would a case with excess outflow be better in this house, as compared to one with more intake than outflow. i'm thinking having more air blowing out of the case would be better but i'm just learning about really cooling systems right now.
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post #6 of 7
Install an intake filter. Make a slide frame to fit a washable filter for a window A/C. You may have to mod the filter, but it would stop a lot of pet hair and you would see it filling up and clean it often enough.
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post #7 of 7
installed this fan as a side fan

http://www.newegg.com/Product/Produc...82E16811999145

worked amazing well dropped temp by 6C..i was amazed that improving air flow would do that much for me.
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