Rust Prevention Question

[Scotty 2 Hotty]

I have a Gun Safe in a Room that was added to my house. It has been in there for about 5 years. That room has not Heating or Air Conditioning and we live in the Upstate of South Carolina. Here it gets very Humid in the Summer and Pretty Cold in the Winter. I keep all my guns VERY Clean and well Greased during storage and have always used Desicant Packs for Moisture control. But out of worry, I bought a Browning Heating Rod and Installed it Yesterday. That thing is pretty warm. How warm is TOO warm? Will it keep things TOO dry? I have never had a rust problem before. Just trying to prevent one in the future. Am I doing the right thing? Your input is valuable to me.
Thanks,
Scott

 

[Marlin 45 carbine]

I think you'll be OK _ I have seen small light bulbs installed in gun safes up here in the mtns of WNC and they did keep them dry.