For recirculation operation, the Z51KII1X6 Clean Air Plus recirculation set includes special accessories for odour reduction of over 90%. It features an anti-fish function with special impregnation against fish smell and an anti-pollen function that retains 99% of airborne pollen while deactivating allergens in the filter. The service life of the Clean Air Plus odour filter is 12 to 18 months. This set is suitable for slanted hoods and comprises 2 Clean Air Plus odour filters, 2 filter installation frames, a baffle plate, a flexible hose, 2 hose clamps, and fixing material.