Gas appliances
Cooktops, ovens, and space heaters can be hidden causes of lung problems. As gas burns, it makes a chemical called nitrous oxide that can inflame your lungs, make you cough and wheeze, and trigger asthma. You also make it when you burn wood, oil, coal, or kerosene. Make sure to install, clean, and maintain appliances properly, and pay extra attention to how well they send waste gases out of the house.