Ok, you say Intake, wouldn't it be better exhaust to avoid dust coming into the case?
Not certain what you are planning, but even if you mounted (2) rads and BOTH outside banks of fans were exhausting air, you'd pull air and dust in from the front and rear, anywhere there's pressure created within the case the outside air volume will move in to fill the vacuum.
Best way to beat dust from my experience is simply
vacuuming your office or computer room often and use a DataVac blower for the slight dust that will still accumulate.
You can go with air filters of course, I've used the medical-grade superfine mesh Demciflex within a closed CaseLabs Mercury S8, and created a wonderful virtually dust-free (almost hermetically sealed
) environment, although all my components ran a bit warmer, especially the video card since it was surrounded by case windows front, top, and side. I've also used some 120mmx120mm filters by Silverstone that were a wider mesh and magnetic, components ran slightly cooler, although then some dust did make it's way inside, so it's always a trade-off of sorts.
Although, it is very cool to "seal up" a case with the Demciflex and move around to the rear of your chassis and feel that "warm air" flowing out the single exhaust port. Then you know your airflow design has been successful, and you've done your job correctly.
After trying many various configurations, I finally moved to open air chassis', and I simply
Blow-Vac probably only 2x/month,
using a DataVac blower and a 6.5HP ShopVac simultaneously, so the dust does not spread around the office space and gets sucked directly into the HEPA filter inside the vacuum.
I had the original white Data-Vac for about 5years, but when I began designing the current Batman work rig, I went with this darker blower, I call it the Bat-a-Vac.
Ok, that joke was so corny - but then so am I.