Features the EnviroSense™ system that automatically monitors air quality with built-in smart sensors for dust and odor levels. The 5-stage air cleaning system includes a washable pre-filter, true HEPA filter with 99.99% efficiency, nano-silver filter, washable carbon filter and the PlasmaDoctor™ ion generator that releases positive and negative ions, creating clusters which attack odors and organic particles. . Molecules of oxygen are released in the process, creating cleaner and fresher air. Also includes a programmable remote control. Energy Star® qualified.