Neff Z821VR1 Replacement Clean Air Plus Recirculation FiltersIntroducing the Neff Z821VR1 Replacement Clean Air Plus Recirculation Filters the ultimate solution for clean and fresh air in your kitchen. With a lifespan of 6 12 months, these high performance filters are designed to eliminate a wide range of kitchen odors, including stubborn fish smells. But that's not all these filters also effectively filter out pollen and inactivate allergens, making them a must have for those with allergies or sensitivities.