I've said this before - but this is just a reminder. I'll be breaking BOTL over time in order to get it into a far better place. Just be patient if you can't reach us! We'll be back
The back of this humidor has a vigilant climate (humidity and temp.) control unit in it. It is three boxes deep and there is 2 inches of clearance along the back for airflow. You can see what I mean at vigilanthumidors.com.