LZ21WWI16 Clean Air Plus recirculation set Special accessories For recirculation mode Suitable for 80 cm wide devices Very good odor reduction Service life of the Clean Air Plus odor filter: 12 - 18 months Anti-fish function: Special impregnation against fish odor. Anti-pollen function: The filter retains 99% of airborne pollen and deactivates allergens retained in the filter. The recirculation set consists of 2 plastic housings, 8 Clean Air Plus filters, a flexible aluminum hose and a hose clamp.