One word of caution to the "chemical" (desiccant) dehumidifier users. A friend now deceased had access to lots of desiccant.
He used it in all of his safes. He kept quart cans of it in the bottom of all his safes. He passed away and his family would let no-one near his stuff for nearly 3 years. It keeps absorbing water. When the guns were recovered for sale they all were sitting in water 2-3 inches deep. Ruined for collectors...
Desiccant works but it must be maintained. if something happens then what. I like the Goldenrod.
