I've recognized that, where I currently ferment, I have very poor temperature control. The consensus seems to be that proper control of fermentation temp is one of the best things I can do to improve the quality of my beer. So, I decided to start this build.
I have a 7.5 gallon Stout Tank SS fermenter, and wanted to make a chamber large enough for this, as well as leaving additional room for bottle-conditioning beer or adding a second fermenter at some point. So far, I've made only ales, but am hopeful I'll be able to hit lager temps, or cold crash in this chamber.
To keep weight down, I framed this out with some 3/4" pine, ripped to 2" wide. This creates the space for 2" of R-Max foil-face foam insulation.
I left an opening on one end to attach the dorm-sized fridge. I opted to do this so that, in the event the fridge fails, I can easily replace it.
The large door is where my SS fermenter will go. I'll install a pull-out shelf here so that I can slide the fermenter out to harvest yeast, add hops, etc.
I'm going to clad the whole thing in 1/4" plywood, gluing the R-Max to it as I go. Then I'll install a second layer of 1" R-Max (local HD is out of stock right now...) on the inside to cover all the seams and add additional insulation value.