The OEM Febreze HEPA Type Air Purifier Tower features HEPA-Type filtration that captures up to 99% of airborne pollutants. It includes a specially formulated carbon pre-filter that effectively traps household odors. The purifier is equipped with indicator lights to signal when it's time to replace the filter or scent cartridge, and a scent control dial allows you to adjust the level of fresh scent added to the air. Designed for medium to large rooms, it effectively purifies spaces up to 170 square feet.