CM NV 690 - Extra Fans - Positive Air Pressure Questions

Hi!

Ready to purchase a CM NV 690 and I have a few questions, if I may?
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I will be purchasing 2 extra fans, Skythe S-Flex 120mm (1900 RPM), one for the bottom and another one for the top of the case and I will also be adding a Skythe Fan Controller KM02.
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The bottom fan will be an intake.

I will most likely add a third fan, 80mm Skythe fan, on the right side of the panel also as an intake but will have a limited role.
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In order to create a positive air pressure in the case, hence less dust, means having more fans blowing in than out so that the case has a net positive air pressure.

My questions are as follows:

1) Should the top fan also draw air in?

2) Are two additional fans enough to create such pressure?

3)) Are there any exterior filters that can be attach to the top fan and/or side
fan?

4) And: Is there any major differences between the CM NV 690 vs the ordinary CM 690 beside the window (that I want) and one less fan and the color?
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The Cm 690 with the extra purchase of the window actually cost less money with the free shipping than the 690 NV 690?

Thank you,

pinibo

140mm is better

IMO, the one with out the window is better because you could get it a lot cheaper and has 1 additional fan spot where the window is, buts it your choice. there is not much different between the two other than that. (the front LED fan is really weak, you might want to switch that, but since you are adding more fans in anyways, i dont think you have to.)

The classic configuration is cool air into the bottom/front of the case and hot air out of the top/rear of the case. An additional fan on the side panel can be used to direct cool air toward the video card or cpu depending on location.

One way or another, directly or indirectly, dust is always going to be a problem.

There is an additional problem. Dust filters, perforated mesh, and fan guards severely restrict ventilation, airflow, and cooling.

Thanks for your replies.

The choices should be as follows:

1) CM NV 690 or CM 690 + window, depending on the price.

2) Three additional Skythe fans: one 120mm for bottom as intake, another 120mm for top as exhaust and one 80mm on other side as intake.

3) Skythe Bay Fan Controller.

pinibo

I agree completely with WR2, no matter how carefully you plan, it's still possible to get "dead air" spaces where you don't want them to be i.e. at HSF and around the GPU. After installation, always check temps. After any changes you make, check temps. Even after adding a fan or 2 or 3, check temps.