The Alen® Paralda Air Purifier has an intelligent, award-winning design that complements even the most discerning décor; all while offering greater efficiency and performance than other tower units on the market.The Paralda"s unique Dual Airflow Design pulls air in through the back of the unit and then circulates purified air through two sides instead of one, delivering maximum amounts of pure air to your living spaces.The Paralda utilizes Alen" s advanced HEPA (High Efficiency Particulate Air) style filtration technology to purify and freshen the air in your home while protecting the filter against bacteria and microbes.Polluted air moves through Alen"s unique, electrostatically charged HEPA style material that attracts and captures dust, pollen, pet dander, mold spores and other airborne pollutants.Alen"s antimicrobial Siver-Ion threads are woven into the HEPA style material, protecting the filter from harmful bacteria and microbe growth.The Paralda"s ozone-safe Ionizer complements the HEPA style filter by charging particles in the air, causing them to stick together and become more easily captured.The Paralda is a quiet operation, circulating all the air in a 500 square foot space more than twice per hour on the highest speed. It comes standard with the HEPA-Silver Filter, designed for easy replacement with a self-closing cover. As with every Alen® Air Purifier, the Alen® Paralda includes a Lifetime Limited Warranty with country of purchase.Looking for Alen air purifiers for use in China? Visit Alen"s China website or buy on Amazon China for 220V units covered by Alen"s Lifetime Warranty and 60-day money-back guarantee.