I am looking to build a ferm chamber that can hold 4 carboys. I would like to have stable temp range from 32 deg F - to 75 deg F. I am building this 'chamber' in my laundry room, and have ample room to work with. I would like to get some ideas from this awesome brewing rescource. Please post ideas for the build with materials and equipment in mind. Also, Pics would be great.