I'm buying a new house and down in the basement there is the perfect setup for a vault room. The room is about 15 feet long and 6 feet deep. Poured concrete walls all around and a steel cover up top (bottom of the front porch). All it needs is a vault door and I will have a walk in gun safe! I plan on framing the room up and putting in drywall, then mounting the guns on the wall. The dilemma I have is keeping the guns from being damaged. Do you think running a few Goldenrod dehumidifiers and keeping the guns well oiled would be sufficient? Or are there better solutions out there for preventing humidity in rooms? What about more heavy duty dehumidifiers like these: http://www.consumersearch.com/dehumidifier-reviews/frigidaire-fdf70s1 Also, if it fails say during a power outage, how long until the guns would start forming rust? Hopefully at the fail point the room was already dehumidified; I can't imagine dangerous levels of humidity could start forming within a few hours anyway.