Germ Guardian AC4200W HEPA Filter Air Purifier; Attention allergy sufferers! The GermGuardian AC4700DLX HEPA Filter Air Purifier takes you through your sneeziest season and beyond. The 360-degree HEPA air filter reduces up to 99.97% of dust and allergens and purifies your room from every angle. No need to thank a stuffy nose for the lack of odor—the activated charcoal filter helps reduce household odors and gasses emitted from cleaning products and other pollutants. This air purifier works for you with four speed settings, a sleep mode, programmable timer and filter change indicator.