It takes me a looong time and a lot of water to chill. (Cu EC) I want to make a CFC. How efficient are they? I want to be able to transfer from my BK thru the CFC to my carboys. and get the temp down to pitching temp. I have cold ground water (64-deg. summer). Will I be able to drop the temp to below 70 with one pass? In summer I could add an ice stage if needed. Thanks for the help.