2 intake fans in front, 1 in back serving as exhaust and 2 top as intake/exhaust.
The board is old, got it on ebay. It's the acer ipisb-vr rev 1.01. It can't control (bios is not UEFI) much, only the 4 pin cpu header to some degree which is why I wanted to offload it to the fan hub.
3 of the...