Austin Air A205C1 Great for people who are; allergy and asthma sufferers, those who are highly reactive to dust, pollen and other allergens and people close to trees and plants, populated areas, farms, cities and roads Designed specifically for allergy and asthma relief with special filtration for removing allergens, chemicals and gases from the air. Quickly stops sneezing, coughing and stuffy noses related to seasonal and annual air problems Removes viruses and bacteria, and will cleanse the air for areas up to 700 sq ft Developed by the Atomic Energy Commission to specifically protect the Human Respiratory System, True HEPA is the most effective particulate filtering media on the market. All Austin Air units use TRUE Medical Grade HEPA, which removes 99.97 percent of all particulates as small as 0.3 microns and 95 percent of particulates 0.1 microns and smaller. Benefits of Clean Air include: sounder sleep, strengthened immune system, eliminated dry mouth and runny nose as well as reduced; snoring, sneezing, coughing, wheezing and nighttime allergies/asthma attacks. &nbsp;And if that wasn't enough, all Austin Air products are made in the USA!