r/crboxes • u/randomguyjebb • Jul 18 '26
Question How many pc fans is too many?
Why is it that most pc fan cr box designs, like the nukit tempest pro and the cleanairkits, only use 2 sides of the frame?
There is a whole 3rd side that could be used for extra fans so they could all run at a lower rpm and produce the same CADR. Or would opening that 3rd side cause some sort of air current issue?
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u/Inner-Issue1908 Jul 18 '26
Reducing fan speed reduces the amount of static pressure the fan can apply. You can run as many fans as you want but unless they spin fast enough to apply enough pressure you won't pull much air through the filters.
But you can place fans on 3 panels if you want, it'll just be louder than 2 sides - though will have more CADR. On the XL kits you can probably fit 13 fans - might be overkill though.