Dehumidifiers heat to a surface temperature of around 100-120 degrees F. The heat creates a natural convection that slowly circulates warm, dry air throughout an enclosure on a 24 hour basis. GoldenRod dehumidifiers are mounting horizontally at the bottom of the safe to work effectively. If you do not see the reduction of humidity after a couple of weeks then you may want to consider a longer unit or our PEET dehumidifier. Protect your guns, ammo and other valuables in your safe from the damaging effects of moisture with the EVA-DRY dehumidifier. This 100% renewable, 100% wireless dehumidifier requires no power to operate. It’s filled with Water Glass Technology crystals that have a much higher absorption rate than traditional, soluble humidity absorbing products. Place EVA-DRY in your safe and let the silica gel crystals silently absorb the moisture in your safe. West Coast Safes carries a complete line of dehumidifiers in the showroom displayed on our safe accessories wall.