2 of my safes are in the house, 1 is in the man cave in my pole barn. Never had an issue with rust, but I err on the side of caution. Lots of money invested and dehumidifier options are cheap.Question for everyone. Is this because your safes are in the garage? Or do you find humidity in the house also? I’ve had mine in the house for 20 years and never dad a problem with rust and don’t use anything. But we’re moving into a house with a shop and I want to put the safe in there.