I have been increasingly dissatisfied with the storage of root crops in the fruit cellar. It is just a little to dry and warm for storage. I end up storing stuff under the benches that I no longer use. Well I pitched it all and built a 22” X 22” X 8’ storage bin for roots and tubers in the GH. The side facing the camera is insulated with 1 ½’ of polystyrene and the two ends and backside are outside walls. The backside and right end are under ground.
Here you can see the insulated front side and a wooden slat floor for air circulation. The lids are hinged at the back and the middle so they fold under the shelves of the GH.