A genuine MA-112 replacement filter set should be used to maintain the effectiveness of the MA-112 air purifier unit. The dual filters remove 99.9% of harmful toxins including allergens, odors, VOCs, smoke, pollen, pet dander, dust, smog, contaminants, and more down to 0.1 microns in size. Perfect for clean air in bedrooms, baby nurseries, living rooms, home gyms, kitchens, offices, and more. Maintain your purifier's Lifetime Warranty by replacing the MA-112 filters every 4-5 months or after 3,000 hours of use, whichever comes first.Captures up to 99.9% of particles including 99.99% of airborne COVID and SARS surrogates!