thanks for reply. I will try to explain a little better ha.
the case has 120mm fan mount points on both side panels and 2 80 or 92mm on the back, so both compartments have 2 fan options, I’m ignoring the mounts on the front panel, so it’s just the rear and sides.
the left side of the case(looking from the back) has the 120mm mount lower down than the other side, this would be down to being able to use an ATX power supply, so the grill is over the fan side completely. Now as that panel has mount holes for a fan theres obviously a purpose, but given psu usually has the fan facing a filter I am wondering if there be too much pressure or whatever if I put an exhaust fan there because the fan on my psu pretty much runs all the time.
Ive seen exhaust fans mounted above cpu coolers, but never a psu, so I don’t want to damage anything if that’s possible.