The dust in your home is made up of pollen, plant and mold spores, pet dander, lint, bacteria, and other contaminants. Regular, daily activities within the home such as dusting, vacuuming, and cooking can increase particulate concentrations. Breathing in these particles can lead to various health effects such as irritation of eyes and respiratory tissues, decreased lung function, and even cancer.PM2.5 Filter reduces the number of coarse and fine particles including PM2.5 particles in the air supply, to improve indoor air quality of your living space especially during haze period, so your family can breath fresh and stay healthy.