DESC: The Airgle 150 air purifier provides an efficient and cost effective method of removing indoor air pollutants. By using a powerful 4-speed fan with ultra quiet motor technology, air is passed through a four stage filtration system consisting of a pre-filter which catches large dust particles and hair, a HEPA filter which removes 99.97% of particulates larger than 0.3 microns, an activated carbon filter which eliminates odors, and a sterilization filter which destroys bacteria.