My gun safe and little shop is just a small room that's attached to the house well part of the house actually but it sits all the way in one corner. I run a regular standing dehumidifier constantly and I've got it on about 50% humidity setting. I empty out about a gallon and a half of water out of the moisture collector everyday like clockwork. It hasn't Automatic Pump on it but it sounds horrid so I leave it off until I leave my house for a while, go out of town for a couple of days or what have you. I manually empty it just to keep that pump from running. It's amazing how much moisture it pulls out of the air. All my tools and guns are in that room so I like to keep it low humidity but that seems like an awful lot of water for that one little space.