Can i put a 140mm fan on the back of my case?

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azelphur

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Dec 25, 2013
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Hi i have a corsair AF140 140mm fan and 2 SP120 120mm fans, i would like to put one on the back of my case (NZXT H440) because it has a red ring on it. can i do this?

In total i have:
2x 140mm fans
5x 120mm fans

Also i would also like to know where exactly should all of my fans go? im hearing alot of things about exhaust and intake so i dont want to mess anything up.
 
Solution
Darkbreeze
That case comes with a 140mm fan preinstalled in the rear location, so there should already be one there unless you removed it or bought the case used and somebody else removed it. So the answer is yes, it can accept a rear 140mm fan.

However, with the fans you have and the configuration of that case, I'd put 1x 120mm in the rear location as exhaust, 2x 140mm in the top as exhaust and 3x 120mm in the front as intake. If you can fit the last 120mm in the top alongside the two 140mm fans, great, if not, save it in case one of them fails later on.


NZXT H440 specs: https://www.nzxt.com/product/detail/143-h440-performance-mid-tower.html
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Darkbreeze

Darkbreeze

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Jun 24, 2014
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That case comes with a 140mm fan preinstalled in the rear location, so there should already be one there unless you removed it or bought the case used and somebody else removed it. So the answer is yes, it can accept a rear 140mm fan.

However, with the fans you have and the configuration of that case, I'd put 1x 120mm in the rear location as exhaust, 2x 140mm in the top as exhaust and 3x 120mm in the front as intake. If you can fit the last 120mm in the top alongside the two 140mm fans, great, if not, save it in case one of them fails later on.


NZXT H440 specs: https://www.nzxt.com/product/detail/143-h440-performance-mid-tower.html
 
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Solution
holyprof

holyprof

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Dec 16, 2011
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Do as darkbreeze told you. Be sure to have intake fans work harder than the exhaust, to ensure that the inside of the case has positive pressure. That will avoid dust entering through the small openings in the case where there are no filters to catch it. If you don't care about dust, any combination is ok as long as it keeps your components cool.

I've read many positive vs negative case pressure opinions but i think the positive pressure theory is better.
 
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Darkbreeze

Darkbreeze

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Postive pressue equals less (Not none, just less) dust. Negative pressure equals higher performance and lower temps. Fans can ALL work much easier when they don't have to fight resistance. Exhaust fans never have to fight resistance unless they're exhausting through a heatsink or radiator but intake fans have to fight against that positive pressure in the case, if it exists. If you plan to run a positive pressure system, be sure to use fans with a high static pressure rating else the fan motors tend to be heated and stressed beyond what they were designed for and could see some shortening of life expectancy and varying degrees of lowered performance.

On cases that are well equipped with intake filters, I recommend a negative or equal pressure arrangement. On cases that have no filtration, positive pressure is ok, but not essential, so long as you simply use a compressor or canned air to blow your PSU, heatsinks and internals out every month or two.
 
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holyprof

holyprof

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Again i confirm what you said, i used a negative/balanced pressure during 1 year and didn't notice dust buildup because my case is filtered and PSU is in the bottom (drawing and exhausting air directly from and to outside). Negative pressure is really bad only if the PSU is in the top position, drawing air from inside the case but the NZXT case op linked has a bottom mounted psu so not a problem.
 
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