Whole-room air purifier with electronic controls features a True HEPA filter that quietly captures up to 99.97 percent of microscopic allergens in extra-large rooms. An odor-reducing pre-filter works with the True HEPA filter to capture & remove odors, VOCs, allergens & germs. Three air-cleaning levels plus a Turbo Clean setting offer fast, complete control to accommodate your personal preference. Shutoff timer automatically turns off the purifier after 2, 4 or 8 hours for convenient operation when you're busy. Plus, electronic filter replacement reminders tells you when a new filter is required to ensure you're purifier is running efficiently at all times. True HEPA air purifier is designed for use in rooms up to 465 square feet.