Originally Posted By Helson
Is the fan you're using pulling the hot air out from the top of its shelf location? It should be.
You may want to experiment with fan location to try and achieve the best results for cooling.

Just an FYI from an old submariner here. While pulling hot air out may provide sufficient cooling in typical HT applications, you will have better air displacement in a closed space by forcing cool air in than you will pulling hot air out.