If you happen to live in a sweltering climate or a part of the world where you get more than your fair share of rain, you will no doubt be aware of the problems that a moist atmosphere can cause in your house. Simple things like being unable to get salt out of the shaker because it is damp or maybe the sugar in the bowl has gone lumpy for the same reason.
relative humidity
Folks are most comfortable when the relative humidity level in their home is in the range of thirty to fifty percent. While some folks need to use air dehumidifiers because they live in areas where it is very humid, causing that muggy, sticky feeling all the time, others need to add a bit of humidity into the air. This is especially true in the wintertime in many areas and air humidifiers can add moisture back into dry air.
A home desiccant dehumidifier makes use of certain materials in order to remove moisture from the surrounding air. This is accomplished by exposing a desiccant type of material to an air stream that has a high relative humidity level. The desiccant material attracts and retains some water vapor and the desiccant is then exposed to an air stream that has lower relative humidity causing the retained moisture to be drawn out of the material.