Dumb question here but on your immersion chillers which end do you hook up the hose to ? Which one is the input and output?
The one that starts on the top and goes to the bottom or the other
With an IC, I can't imagine it would make too much of a difference, but if it were me, I guess I would have the cold water enter from the top since theoretically, that wort should be warmer, then spiral downward. But like I said, I don't really think it matters.
BTW, there are no stupid questions, just stupid people.