This model is a cost effective solution for those who suffer from multiple chemical sensitivities, or extreme environmental illness. Not only do their special combination of filters deal with the main environmental offenders, the unit itself is not going to cause a reaction either. They contain no glues, or bonding agents, totally inert gaskets, unbleached pesticide free cotton muslin pre-filters and motors with minimal varnish on the windings to prevent off-gassing and can significantly improve the quality of life for chronic allergy sufferers. It has a large 18lb high efficiency carbon filter and a hepa filter to screen out particulates too, as well as dealing with chemicals and odours, such as perfumes, plastics, computer equipment, home furnishings, cleaning materials, etc. |  | |  |