What Is the Purpose of a Dehumidifier?

Dehumidifiers take the moisture out of the air and dispense it into a container that must be emptied. Households throughout the world have these machines, but few people know what purpose they serve.


When you mix heat, darkness and dampness, the result is mold growth.  These fungi can wind their way behind walls, in furnace ducts and in basements.

They pose both a health threat and an environmental threat.  Dehumidifiers eliminate the dampness and thus the mold.

Dust Mites

Microscopic bugs called dust mites thrive in areas of high humidity.  These insects can crawl in the crevices of fabrics and furniture and cause a variety of health problems.

A dehumidifier will lower the household humidity and eliminate the dust mites. 

Other Insects

A humid environment is the ideal place for many types of insects to thrive.  Cockroaches, water bugs and termites prefer warm, humid climates.

They can pass on disease and are an aesthetic nuisance as well.  Dehumidifiers can reduce the humidity of their environment, making it not such a nice place to live.

Asthma and Allergies

Asthma and allergies are common maladies.  Many of their symptoms can be triggered by humidity.

Household and industrial humidifers can reduce the humidity to low levels, easing or eliminating allergy and asthma symptoms. 

Busting a Traveling Pest

A humidifer in the basement can keep mold and mildew from traveling throughout a house via furnace ducts.  Basements are notorious for fungal growth and a dehumidifier can keep it from infecting an entire household.

About the Author

Brock Cooper attended Illinois Wesleyan University in Bloomington, Ill. He was a reporter for seven years with a daily in Illinois before branching out into marketing and media relations. He has experience in writing everything from press releases to features on a variety of subjects and forums. His work can be seen in NewsTribune newspaper, Chicago Parent magazine and several websites.