Bionaire Delta Allergen Air Purifier: * True HEPA allergen remover * 99.99 percent filtration * Mold capturing technology * Filters household dust, ragweed pollen, grass and tree pollen, dust mite debris, mold spores and pet dander * Quiet operation * 6.4 air exchanges per hour * For medium rooms up to 155 sq ft * 2 PerformancePlus filters included