Optional accessoriesFor recirculation operationFits 80cm GlassdraftOdour reduction > 90%Lifetime of CleanAir Plus odour filter 12-18 monthsAnti-fish functionality: Especially treated against fish smellAnti-pollen functionality: The filter retains 99% of airborne pollen and deactivates allergens which are retained by the filter.The recirculation kit consists of 2 plastic housings for 8 Clean air plus filters, a flexible aluminium ducting and a ducting clamp