Compatibility and fit - Filter set compatible with Philips 1000, 1000i, and 2000 series air purifiers. Models: AC1214, AC1215, AC1217, AC2729. Replaces original FY1413/40 and FY1410/40. Please confirm your filter model before purchase. Filtration performance - AC2729 filterset delivers 99.97% filtration for particles down to 0.3 microns, helping reduce allergens in the air. - The AC1214 filter actively protects against pollen for cleaner breathing air. Double filtration design - The AC1215 air purifier filter uses two filter types: FY1410/40 HEPA filter and FY1413/40 activated carbon filter. - HEPA filter provides efficient filtration of 99.97% of particles as small as 0.3 microns. - Activated carbon filter absorbs common odors in the home, contributing to fresher air. Replacement guidance - To maintain air quality and protect the performance of your Philips 1000/1000i purifiers, replace the FY1413 and FY1410 filters every 6-8 months depending on air quality and usage. Use scenarios - Seasonal allergies: reduce pollen and airborne allergens for easier breathing in bedrooms and living spaces. - Homes with pets: minimize pet dander and odors in common areas, bedrooms, and lounges. - Kitchens and living areas: control cooking smells and general odors to keep indoor air fresher during daily activities.