While you’re spending more time indoors, you may begin noticing things about your home that you didn’t notice before. Maybe it’s that crack in the bathroom tile, the ash mark on the wall near your candles, or the blanket of stagnant air floating around you. John McKeon, MD, CEO of Allergy Standards, a company that Certifies air purifiers as allergy and asthma friendly for the Asthma and Allergy Foundation of America, says that having good indoor air quality is an important part of living in a healthy home.