i use a stand up coke cooler (with the glass door). the seems like i paid a buck fifty for it,,, the compressor dident work, but i dident need that anyway.. i used the fan that was in it. i put 11" flexwatt on the back wall. and then made a false wall on the back (about 2 inches off the flexwatt).. i also made a false wall from the fan (thats on inside top) and fixed it to the false wall in back so the fan pulls air from the incubator, goes through the false wall, and out at 1/2" x 11" slits that i made at every shelf in the system. its controles by a spyder robotics herpstat praportional thermostat. in the bottom of the unit, i put a large sterlite tub filled with water and used a small fish tank aireator (sp?) that produces perfect humidity in the incubator.. BTW,,, the incubator also holds perfect temps as well!!!!!!
spooky