[majorvices]

On my 1bbl system I am using a CFC (NB's Chillzilla) in conjunction with a pump and WP it back into the kettle.

I just recently started doing this (once I got a pump) and I think it's the best of both worlds. Rapid chilling (I see about 10°C/min over the first few minutes) eliminates the SMM and hop utilization issues, and it allows you to run a closed system the entire time the wort is below boiling.

I'm just using a homemade garden hose CFC though. A Chillzilla is on the wish list, but a long way off.

With my IC I am able to run a closed system too, I have a notch in my kettle lid. I simply close the notch with aluminum foil. To be safe I usually wrap the whole lid in aluminum foil too. And, FTR I see a 10 degree drop in the first minute or two with the IC as well. I have not tried the Chillzilla on my 12 gallon system so not sure if there is any difference.