Over time, forced-air ducts collect and harbor no small quantity of impurities, ranging from allergy-inducing dust to illness-causing germs. As a forced-air system operates, those particulates become airborne, blowing directly into the living spaces of your home. For people concerned with home health, in-floor heating represents a breath of fresh air. Because it involves zero ductwork, the technology does nothing to diminish indoor air quality. If you normally spend the winter suffering in red-eyed, scratchy-throated discomfort, make no mistake—in-floor heating equals relief.