Hunter 30707 PermaLife medium room air purifier lets you breathe easy. Hunter air purifiers are proven to capture at least 99.5 percent of airborne particles for cleaner, healthier air quality. This powerful unit"s permanent HEPA filtration removes 99.97-percent of indoor airborne pollutants like dust, smoke, pollen particles and other allergens from your air. Microban antimicrobial product protection - ONLY on Hunter purifier filters - inhibits the growth of bacteria, mold & mildew that can cause odors and adversely affect filter performance. A separate ionizer enhances air cleaning and freshens the air. Easy maintenance features include a cleanable PermaLife filter that never needs replacement, a filter maintenance reminder, and a replaceable carbon prefilter that lasts up to 3 months. Delivers 176 cubic feet of clean air every minute. Powerful 3-speed whisper quiet Hunter fan motor. 3-speed mechanical control and separate ionizer control for ease of use. Sleek black unit blends with any decor. 5-Year limited warranty.