Home dehumidifiers can be beneficial for people suffering from allergies or asthma, according to WebMD. A dehumidifier can reduce the amount of humidity in the home, which reduces common allergy and asthma triggers such as dust mites, mold and mildew.
Dehumidifiers work by gathering the extra moisture in the air, which reduces the humidity, explains the Mayo Clinic. They work in a similar way to air conditioners, but do not give off cool air. Reducing the humidity in the home is important for allergy and asthma sufferers because it also reduces some of the causes of these ailments. Dust mites increase in numbers in environments where the humidity is high. Mold and mildew also grow in areas with high humidity.
Dehumidifiers may also be beneficial for people who live in a climate that is naturally humid or if the home shows signs of high humidity. These signs can include wet spots on walls, moisture on windows and a stuffy feeling or musty odor, states WebMD. If only one room in the house suffers from high humidity, a small dehumidifier may be all that is needed. However, if the entire house is humid, an investment in a whole house dehumidifier may be necessary.