Hey newdope, Merry Christmas. Because your heat is not WAY too high, only a few degrees, it seems like your fan-change idea might be the way to go. I would look up the fan models that are currently installed on that box online to find out what the CFM number is for those fans. Then, you can just purchase fans with a higher CFM number, which will move more air. Even if you do that you will still have to monitor the temp and humidity. How tall is that total cabinet? Will you be going all the way to harvest in there? The pictures make it look too small for a total grow, but maybe that's just the pics.