Ok, the fan would be blowing the internal hot air, The purpose is to cool off by using external cooler air. I am also thinking about turning the boards and the transformers from internal to external and fabricating a pexiglass or metal cage. I would be using the same threaded hole that are use for the boards and the transformer. I think that will be a better alternative, than cutting holes and I can mount a circuit that will come on when ever it gets more that say 90 degrees inside the fabricated cage. What do you guys think.