Hi Ross
Thank you for reminding me of the peltier elements. I did look into this couple of month ago but I discarded this solution due to humidity problems, if I remembered corectly. The devises I looked on was only specified up to 70% relative humidity, I will need to operate between 75-100% relative humidity. I belive there could be a problem with ice build up on the cool side in the cabinet were the relative humidity will reach the dew point on cooling. Maybe it is possible to ventilate the cabinet before cooling....?
I was looking on this kind of devices
http://www.supercool.se/catalogue/ca...p?mid=23&sid=8