Alen T500 HEPA Air Purifier, Antibacterial, White Guaranteed. Forever. ~ our forever guarantee (Lifetime Warranty) is unmatched by any other air Purifier company. Period. For lifetime peace of mind. Compact & powerful ~ cleans up to 500 SQFT of air every 30 minutes on its highest speed. T500 is 25% smaller than comparable Tower air purifiers, yet 63% more effective in real home tests. Filters and sterilizes ~ recommended for allergies, dust, mold, bacteria, light odors & chemicals. Antimicrobial ~ pre-filter captures large dust/hair. Hepa layer captures airborne particles including dust, pollen, mold, microbes, and dander. Activated carbon layer absorbs harmful particles such as cooking odors, household chemicals, and more. Antimicrobial compound on the HEPA layer kills captured bacteria & fungi. Ozone safe ~ certified ozone safe by the California air resources board (CARB). the T500 also includes an optional Ionizer that works in tandem with the HEPA filter to improve filtration and freshen your air. The Ionizer can be turned on or off at any time.