[Sweet_Leaf_PDX]

I think most walk in humidor units are designed to put out moisture but not take moisture out of the air. To have a well maintained humidor you need a way to increase and decrease the RH when needed. Some more advanced set-ups will do this but they are costly. If the ambient RH is not lower than the RH in the humidor, then the air movement caused by opening and closing the door will not help regulate humidity.