If you have a gun safe, especially in an area that is not regulated by your heating and air system, you should invest in a simple dehumidifier to protect your investment.  Dehufmidifiers keep the temperature inside your safe to a constant level with no more energy than that of a small light bulb.  By doing so they will keep condensation from happening on your firearms, which as we know can cause terrible damage. Most safes will have a knockout...