Congo Line
(not the dance)
I find the whole concept of ventilated seats confusing, regardless of the direction of the fan. Wouldn't the air pass through the holes in the seat that are not covered by your behind? How does your body get exposed to the air at all if the perforation beneath it is blocked?
Cooling would also occur via convection of heat away from the seat/skin interface. As long as air is moving within the seat, then it's pulling heat from the area.