The 18" rod helps lower humidity levels by warming the air. This increase in temperature will cause the air to circulate within the safe, thereby preventing damage associated with moisture.
The rod will heat up to a surface temperature of 125°F and circulates warm air throughout the safe or vault. The warm air rises, while the cool air drops.
With constant air circulation process, it eliminates musty smells and dampness and the content in the safe will be protected from rust, mildew or corrosion, as well as dries out any moist air within the safe.