I read a forum post from "Smiling Jack" that the five fans on his system were all designed to blow air out of the kit and that he received permission from Jack to change one of the fans so that it blows air into the kit. That sounds like a good idea to me so I checked my kit. My kit is a recent one (bought Jan 31) and it has 6 fans. I am not sure of the air flow direction, but the two fans above of the converter seem to be blowing air out. However, the fan on the outside part of the converter (the one attached to the vent hose) seems to be sucking air in through the converter. If true, I wonder if this is a design change by Jack, inspired by Jack, to run the coolish air from the cabin through the converter and out the box via the other fans. Can others with a recent kit confirm this? If not (i.e., if the converter fan actually blows air out like all the other fans), would it make sense to reverse it?