does a case have to be elevated a certain ammount to have psu mounted fan down?

garciaj

Reputable
Jun 28, 2014
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4,510
i have the coolermaster haf 922 case and i currently have my psu with the fan facing up because the case is only elevated like a half inch from the table its on and i didnt know if that was enough room for the psu to breathe if i put it fan down.

is there a certain height the case has to be elevated? or would it be fine if i switched it to fan down.
(btw there is no filter at the bottom of the case either)