I'm looking for some advice on a DIY fermentation chamber. I don't have anything at this point so I was wondering what you guys have found to be the best/most cost effective method. For starters, unit will be in my garage with hot summers of 95+ f and mild winters rarely below 30 f. Also this will be primarily used for fermenting around 68 f. I would like the opportunity to convert it to something with a tap that i could serve from. It needs to be big enough for atleast 2 glass carboys.
So, I've seem people make these out of mini-fridges, chest freezers, and window air conditioners. Would a portable airconditioner unit work? I havent seen any of these and im not sure why. What do you guys think is best? I don't want to spend $30 on a mini fridge and have to spend 120 on conversion materials when I can just spend a little more on converting a chest freezer.