A dehumidifier? It is some kind of a gadget for removing excess humidity from the air in a room or building. This is very useful for problems like dry skin, swollen nasal passages, sinusitis or rhinitis and asthma. This is a “must” for my family and everyone else. My husband has asthma (he’s an excessive smoker) while I have chronic rhinitis mostly triggered by various allergens such as dust and dry air. Check out this site in case you need recommendations on choices of the best humidifiers for you and your family.