Winix freshome model p150 true-hepa air cleaner with plasmawave; 3 stage air cleaning with activated carbon pre-filter; 99.97-Percent efficient true-hepa filter and plasmawave technology; air quality sensor, 4 fan speeds and auto mode. energy star qualified; aham room size rating 150 sq ft. a fresh take on clean air. introducing the all new winix freshome series of air cleaners. 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 p150 is designed for optimal use in a small bedroom, nursery or office; 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-Percent efficient true-hepa filter the.