A dehumidifier is an appliance that removes moisture from the air in your home. It works by drawing air from the room over a coil cooled to a very low temperature by a refrigeration system, which is commonly known as refrigeration dehumidifiers. The water vapor condenses on the cold surface and the liquid water drips into the water collection bucket underneath. More and more dehumidifiers are now using an alternative method known as desiccant dehumidifiers. A dehumidifier can help prevent the build-up of mold in your home by eliminating mold and dust, which can also eliminate invaders like silverfish, cockroaches, and spiders. Lower humidity levels may also benefit people who have asthma or allergies. In addition, a dehumidifier can keep away other pests like termites, earwigs, centipedes, and roaches. A dehumidifier is a good option if you have persistent humidity or dampness problems, or if your home has been affected by a flood or leak and youre trying to dry it out.