Does it matter as to which tube is set up as the inlet, top or bottom? Will it have any effect on cooling if the inlet is changed from one side to the other? Also, I would like to mount the cube in a vertical position, with the inlet/outlet tubes facing up, and wondered if this was a no-no? I will still have a tube on bottom for an inlet/outlet, as well as a top tube inlet/outlet, via this configuration. In my refinery's large shell and tube coolers we put cooling water on the lower side as the inlet so that the water pushes up to air-free the tubes. I have a feeling that the inlet should go on the bottom for my cooling cube based on the setup we use at work. On a sidenote, the quality of the DD Cooling Cube far surpasses that of the AquaCoil from BeCooling, as I have both and was disappointed with the AquaCoil to the point that I ordered the DD Cooling CUbe.