The Sharp FPK50UW Plasmacluster Ion Air Purifier with True HEPA Filtration effectively reduces pollen, dust, pet dander, smoke, germs, bacteria, viruses, odours, mould, and fungus in your living space. There is a three-stage filter system including an activated carbon filter and long-life True HEPA filter, which captures 99.97% of particles as small as 0.3 microns from the air that passes through it. Patented Plasmacluster Ion Technology is proven effective in reducing most odours that conventional filters don't reach. The FPK50UW air purifier is an ideal solution for allergy sufferers, asthmatics, pet owners, and smokers, and best used in a bedroom, living room, study, or exercise room. "Plasmacluster Express Clean" gives you sixty minutes of high-density Plasmacluster Ion production and high-fan speed for an extra boost of clean when you need it, and a hands-free return to the prior mode when complete. The unit has LibraryQuiet operation (as quiet as 22 decibels, or the sound of rustling leaves) and is ENERGY STAR rated, so you can run the unit continuously while saving money and energy. Features Recommend for Medium-Sized Rooms up to 259 sq. ft. Plasmacluster Ion Technology, 7000 Series Max, Med, Sleep Fan Speeds, Plus Express Clean CADR: Smoke (167) / Dust (171) / Pollen (188)