Okay, there's definately something wrong...
Those temps I gave were with the case side off, since I was doing some wire reorganizing and zip-tying...
I put the side back on... The temp goes up to 36 degrees! Take it back off... Down to 26. The side door has a vent, but I have it taped over, for a more consistant airflow... I guess I'll make a cardboard vent to my CPU fan tomorrow.