“Too much [humidity] and you’re going to have negative impacts such as mold buildup and extra moisture inside your home,” says John McKeon, MD, CEO of Allergy Standards, a company that Certifies home products as allergy and asthma friendly for the Asthma and Allergy Foundation of America. Too much humidity creates an environment preferred by dust mites and other allergens, he says, but if the air is too dry, your mucus membranes suffer the consequences.
