So, I'm going to get a few fans for my AVR, but another question comes to mind. What about venting the heat out of a closet? Do I just put a vent to the attic? I've got an opening at the bottom for cold air to get in, but the heat has nowhere to go. What would be the best way to get the heat out without an active vent? Just cut a hole and put a vent with a tube?