When the air's too damp: Dehumidifiers and air conditioners

Just as air that's dry can be a problem, so can air that's too moist. When humidity gets too high, which can be common during summer months, it's a good idea to take steps to lower indoor moisture. You can lessen humidity by using:

• An air conditioner. Central or window-mounted air conditioning units dry the air.
• A dehumidifier. These devices collect extra moisture from the air. That lowers humidity levels. Dehumidifiers work like air conditioners, without the "cooling" effect. They're often used to help dry out damp basements. If you use a dehumidifier, drain and clean its moisture tray often. This helps prevent bacteria and mold.