Hot air rises. Same principle on the INSIDE of the refer as on the OUTSIDE. On the inside, with NO extra fan, the convection air rises from the rear up and thru the Evap fins and then hits the top of the refer and flows over forward and down the front, removing the heat from the items in the refer. That is the design of a absorbsion refer. Also, that is why it is CRITICAL to NOT have block type food or plastic baggie type food against the REAR wall of the refer. That will stop the normal flow of air up and over. You want a 1 inch gap to help air flow. So, following this principle, you want your added inside fans blowing UP from the bottom. Doug
