Today’s tightly sealed and energy efficient homes save money and are better for the environment. But most are not properly equipped to filter and purify the constantly recirculated air. Even “leaky” older homes can accumulate high concentrations of pollutants, as well as exhibit other indoor air quality problems such as dampness, stuffiness, fumes, or dryness. Almost every aspect of home life can generate indoor air pollution. Cooking, cleaning, furniture, paint, and pets are just a few of the many culprits. When trapped and recirculated within the home, airborne pollutants accumulate through time.