Airborne particulates such as dust, dander, pollen and spores, as well as contaminants from cleaning chemicals, cosmetics, paint, carpet and plastics can make indoor air unhealthy to breathe. These air pollutants travel through your heating/cooling system 4-5 times every hour. The HEPA Air Cleaner connects to your system’s return air duct and diverts 1/3 to 1/2 of this dirty air through a tightly sealed 3-stage filtration system. All the air in your home can be cleaned through the filter as many as 67 times per day depending on your house size and model chosen. The Fantech Whole House HEPA is ideal for homes up to 3,600 square feet.