Alen T500 Allergy Air Purifier - Pet Dander & Odor Neutralizing HEPA Filter - 500 SqFt - 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 FRESHENS ~ Recommended for Allergies, Dust, Pet Dander and Heavy Odors. ODOR NEUTRALIZER ~ PRE-FILTER captures large dust/hair. HEPA LAYER captures airborne particles including dust, pollen, mold, microbes, and pet dander. ODORCELL layer contains a natural vinegar-base compound to neutralize odors at the molecular level. Capable of tackling the toughest odors in your home, such as cat litter, puppy potty pads and even diaper smells. 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.