HepaAirCare is an ecommerce store for air purifiers and hepa filters for homes as well as hospitals. We take our home purifiers VERY seriously and they are not only built in the US but, have at least a 5 year warranty. Obviously, we know that your patients or children's lung heal is of the utmost importance and therefore, this is why we take so much care in the filters and purifiers that we build. Visit our website or follow us on the web.