Increase moisture to eliminate dry air caused by climate, furnaces and central air. Improve your health, make it easier to breathe, and ensure that your home is a more pleasant place when you get rid of that annoying dry air. A humidifier can increase the moisture in any room of your home to improve air quality, and counter act the harshness created by attempts to control climate. Instead of just dealing with asthma, bloody noses and dry, itchy eyes, increase humidity and eliminate these seasonal problems.