The Winix FresHome P150 True HEPA Air Cleaner with PlasmaWave Technology combines the best air cleaning technologies to capture all of the unseen particles suspended in the air, including dust, pollen, pet dander, smoke, mold spores, organic chemicals and household odors. The P300 is the mid-sized model in the series and is designed for optimal use in a large bedroom or living room. Featuring a 3-stage air cleaning system, the P150 uses an activated carbon pre-filter to remove household odors, hair, lint and other large particles, helping to extend the life of the HEPA filter and reduce housekeeping. The 99.97% efficient True HEPA filter then captures the particles you can't even see, while the PlasmaWave Technology safely breaks apart odors, chemical vapors and other pollutants at the molecular level to offer superior all-around air cleaning. An auto mode and air quality sensor combine to deliver set-and-forget convenience.