Envion therapure EA150 compact true HEPA 3-in-1 air purifier has a 170 sq ft capacity. It removes odors, smoke, dust, mold, and pet dander eliminator for allergies and smokers. The Envion EA150 is the small but mighty air purifier with the filtration power of much larger and more expensive units. With its streamlined, energy-efficient design, there is not one inch of wasted space. Its oversized 3-stage filter fills the entire width of the air purifier, and air is channeled directly through the unit, so you're getting the maximum air filtration power in the smallest possible space. Traditional tower air purifiers bring the dirty air in through the side and send the clean air out the top, which limits the efficiency of the unit. The EA150 goes in the front and out the back - allowing you to clean all of the air in a 170 sq. ft. room 3 times in just one hour! The true HEPA filter removes particles down to .3 microns and smaller and the Activated Carbon/VOC filter captures off-gasses from household contaminants, including those from furniture, carpeting, building materials and more. This is the one air purifier that does it all!