OK. Let me try to splain. I'm not too good at drawing pictures with words, so be patient with me.
The fridge would indeed be facing the rear. That is why there would be an "airshaft" for lack of a better term. Basically, it would be a chimney kind of thing located directly in back of the fridge that would vent the heat through a vent located in the roof of the tear. This "chimney kind of thing" would be an airshaft open to the ground and open on top with an appropriate cover so as to disipate the heat buildup. It would be as wide as the fridge, maybe two inches deep and run the whole height of the tear cabin at that particular point.
In other words, picture a chimney that would have a 2 or 3 inch by 22 inch footprint, an airshaft so to speak, that would be open in the floor all the way to the roof. As I look at some of the tears, I would think that this is not taking up much more space than say a cooler and an air conditioner put together.
I will probably use the tear in primitive sites where electric and ice will not be readily available. So a dorm fridge and maybe even the cooler thing may be out of the question. I am polish, not german, and enjoy my beer ice cold. Perhaps you can see my dilemna.