My fermentation chiller. I used a discarded tile crate from my neighbor and lined it with two layers of 3/4" extruded polystyrene for insulation and caulked the hell out of the seams. Also put casters on it so it's easy move around the garage. If it works like the ones I've read about I can put 6-8 frozen one gallon jugs of water in it along with my fermentation vessel(s) and keep the temp 30 degrees or so cooler than the outside ambient temp. Testing is next.
