I have two CFC’s for chilling. One is the typical copper coil inside a larger diameter hose. It was made for me by the owner of my LHBS and I have used it for over 8 years. It is very effective and allows me to chill and whirlpool directly from my 15g BK. I do need to pump water from an ice slurry during summer. My other is a Blichmann Therminator that I received as a gift but haven’t used as yet.