Just to give you a heads-up, the ARS racks don't really hold humidity too well either. Although I suppose you could always just cover up some of the ventilation holes. Most of the manufactured racks out there are designed to be used in a humidity controlled room. If you're looking for a rack that will hold humidity, your best bet would be to go with an expanded pvc rack. Animal Plastics and Reptile Basics are two of the bigger companies that offer them.