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How much space does a exhuast fan need?

post #1 of 7
Thread Starter 
The back of my case is pretty damn close to the wall, about 4-5 inches. Is this enough? How far should the exhaust fan be away from the wall to have perfect airflow?
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post #2 of 7
That's more than enough. Unless you're about 1" from the wall, there shouldn't be a problem.

Though being close to a surface means the air hitting the surface will generate turbulence and thus it will make more noise.

But 4-5" should be just fine.
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post #3 of 7
4 or 5 inches should be enough. As long as the air has the space to exit the case and then change direction, which it doesn't take much space to do, because it's air, you should be fine.
post #4 of 7
For perfect airflow, about a foot will do. 4-6 inches will be fine, especially if it's a fan with decent static pressure.
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post #5 of 7
Thread Starter 
Thanks, do you guys recommend gutting rear grills if I use a exhaust fan?
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post #6 of 7
You can have a rear grill there so it won't chew up fingers/cables and/or break a blade when you accidentally stick a finger or cable near it while unplugging things at the rear.
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post #7 of 7
Quote:
Originally Posted by LivingChampion View Post
Thanks, do you guys recommend gutting rear grills if I use a exhaust fan?
Not unless you stick your hand back there a lot.

Less grills = less turbulence = less noise
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CPUMotherboardGraphicsRAM
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