Mold is common in buildings with lots of moisture and it poses health risks to those who live and work inside those structures. According to the Centers for Disease Control and Prevention, mold can cause allergic reactions that irritate the eyes, nose, throat and lungs. Coughing, wheezing and swelling of the throat are among the symptoms a person can present.
Keeping relative humidity between 40-60% is ideal, says Chris Roman, an energy industry professional at Conservant Systems, since viruses, bacteria and mites don't like to live in those ranges.