The Oreck DualMax® Air Purifier provides easy maintenance due to its permanent filtration system, Oreck's patented Truman Cell®. DualMax features two fans that produce twice as much airflow as our leading air purifier. That's double the power to move the air, draw it in and capture pollen, dust, pet dander, cigarette smoke and other allergens from the air that passes through the filter.* Because this model is factory reconditioned, it comes with a 1-year limited warranty.** It's perfect for rooms up to 200 square feet.^