I gotta question how well it works. It says that it can take your wort "down to 35F below ambient IN A MATTER OF DAYS and hold it there". We all know the first 2 or 3 days of fermentation are really critical, in terms of temp control. Seems that there would have to be a lot of trial and error, to be anywhere near as accurate as just setting a controller on a fridge and letting it go.I think that is intended for cold crashing your beer. You should be chilling the wort down to pitching temp before going into your fermenter.
Wouldn't work for me. I depend on my ability to drop the wort in the fermenter from ~85 to pitching temps in a few hours. Just not possible to reach 64 much less 50 with 70 degree tap water.
Yeah I have no clue how long that would take for this thing to drop it down from like 75 (I'm assuming you don't get the wort to the water temp) to 60 or 50.. Both are less than their 35 drop that they say will take days... but not but a whole lot.. though I imagine those temps as you get closer to their limit would take much longer.