The temp pull down has yet to be tested by me. I know when i put it in a 5 gal bucket and let it run for 30 min the finger has turned into one big giant stick of ice. The Finger coil will go to - 30 degrees so a temp controller is needed for sure. I picked it up to do a cold water tank that i now do not have the room to do. Sorry to say i am not shipping either - far to heavy
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