Originally Posted by oliverw92
But say you have an exhaust fan and the back of the case is right up against the soil, the fan will die because it has nowhere to exhaust the air in the case.
Put a fan face down on your desk, and power it on. Tell me when it dies.
I wasn't thinking the exhaust fan would contribute much to the cooling effort (although I'd still say that any extra moving air would be a good thing in the situation). I was thinking more about the CPU fan, and how that would keep air moving around in the case, and touching the inside sides of the case, and help keep things cool. I have no idea if that sort of passive cooling would be sufficient, but it would certainly make for an interesting experiment.