I have a couple Blichmann conical fermenters and because it is warmer where I live I can only brew lagers for about 2 or 3 months in Dec, Jan and Feb. I have looked at ways to cool them, but I have mostly contemplated external means of cooling (i.e. a large walk-in refrigerator, custom cooling jacket, those cooling chips) but they all involved a really large investment (walk in cooler) or seemed overly complex (custom cooling jacket). And I'm not so sure the cooling chips would provide enough cooling. I recently received a mail order homebrew catalog that had a stainless steel coil style wort chiller (most are copper) and that got me to thinking about using it to cool the fermenter internally. If I could mount the chiller inside the fermenter, make a connection thru the top of the fermenter to an external supply of ice water in a large cooler, use a digital thermostat like the Ranco or Johnson, put the temperature probe into the fermenting beer and have the thermostat turn on a pump to pump ice water thru the wort chiller when it gets too warm it seems like a workable solution. It never dawned on me until I saw the stainless wort chiller. The only other issue is that I would have to somehow insulate the fermenter so that it wouldn't run constantly and use up a ton of ice, but this seems reasonable. Does anyone have any experience doing something like this? Any concerns? Any ideas? Thanks for any input you may have.