I don't believe this to be true, DD. Warm air can be damp, too. I have my guns in a safe in the basement with a Goldenrod and I had leather holsters in the bottom of it for a while. I noticed after a time that the holsters were getting moldy. A gun safe should be kept with the temperature around 60* and one needs to watch the humidity also. If you have a gun in a damp area and you store the guns upside down, standing on the carpet, in the bottom of the safe, the Goldenrod's heat won't get to the bottom of the safe, so the ends of the barrels can rust too because they can pull moisture from the carpeting. If you are going to store them upside down, I think it would be better to put the barrels on a piece of wood if the safe has any dampness. I started hanging my Goldenrod as low in the safe as possible. But if a safe is outside in the garage where the weather is down around freezing all the time I don't see how a Goldenrod is going to keep the safe warm enough. If it gets hot in the summer, like mine does (up around 100*) the inside of the safe will be hot too and that can damage them also.
