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Question

Positive or negative pressure system?

by firefivestar / May 8, 2013 11:09 PM PDT

so im getting a new case [apevia x-dreamer4-bl] and was thinking of what kind of ventilation i should choose. im aware the positive and negative aspects of both but im still uncertian. i have an image that has info on fans, cfm, airflow, ect. here. take a look at that and say what you think. the setup of the fans is uncertian simply because the huge gap in CFM for intake and exhaust for both setups due to the 200mm fan. Im also going to be getting a new PSU with a 120mm fan but i have not yet added that to the diagram.

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All Answers

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Answer
Just sharing.
by R. Proffitt Forum moderator / May 8, 2013 11:39 PM PDT

I've used both over the years and can't see any clear winner.
Bob

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reply
by firefivestar / May 9, 2013 9:05 AM PDT
In reply to: Just sharing.

im thinking more towards a positive pressure system but now the problem that faces me is the fact that there is 5x more air going in than out. i would assume its not good to have too much pressure simply because there wouldnt be enough air leaving to give it good flow so im thinking maybe about spinning some fans and doing more of a 100:250 CFM setup instead.

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Are you attempting the old all fans in or out idea?
by R. Proffitt Forum moderator / May 9, 2013 9:13 AM PDT
In reply to: reply

It's your choice in the matter. Old school is to exhaust at the top and pump in somewhere else.
Bob

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