The Envion EA150 is a 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. Featuring a cleanable pre-filter, true HEPA filter, and carbon/VOC filter, this purifier clears molds, dust, pollen, smoke, and other allergens in the air. The EA150 goes in the front and out the back – allowing you to clean all of the air in a 170sqf room 3 times in just one hour! This is the one air purifier that does it all!