The NuvoMed has a built-in, high-grade HEPA filter that removes 99% of air impurities like dust, pollen, smoke, bad smell, mold, and pet dander. Clean air with less airborne allergies and pollutants creates healthy and safer environment. Using fans, impure air is brought in through an intake grill on the unit. The air then passes through the filter and removes the pollutants, allergens, and other contaminants from the air you breathe. Once the air is filtered, the fan quietly blows the clean air back to your room.