Refr inn draumspaki wrote: Greetings, 
Since we are on the subject of making stuff and things, I need to know if building anyone insulated box for temperature control. I am trying to make one and would like to see if anyone has done one so I have something to follow other then my gut and pint glass. 
Fox 

Go to (home depot, lowes, whatever) and get a sheet of the 1" R5 extruded polysytrene insolation foam ( <  $20).
Cut to size, duct tape edges inside and out.   Done!

Now, you can get fancier.  
Make sure the base is large enough that the uprights sit on it, and the top large enough to sit on the uprights.
 For an easy access door, cut strips 2" wide, two the height of the uprights and  two 2" shorter than the width
between the uprights.  Tape these on one opening to act as seals that one of the uprights will butt up against, 
and only tape that door on the outside.
The top can be designed to allow the neck of the fermentation vessel and airlock to extend above the top.

To get really fancy, add a industrial Petlier Junction to the set up, with two computer fans mounted, one on each
side of the Junction. (One inside the box fro circulation, one outside to move transferred heat around efficiently.)
Use a 12 VDC, 6 watt (or as needed by the Peltier Junction) power supply, and a thermostatic control on the
power supply attached to a thermocouple inside the box.

Drive the current one way, you can cool the box up to 20 F below ambient, reverse the current and you can warm
the box up  to 30 F above ambient.   Use the Thermostat to set your desired temperature.

The PT doesn't work very fast, it could take 24 hours to cool a 5 gallon vessel 10 F, but once you reach the 
desired temperature it will hold it there.

David Gallowglass, tinkerer, alchemist and inactive brewer.