The Wpro extractor fan carbon filter FAC529/1 C00383473 has a strong absorbent action that protects against the spread of bacteria in the air, and keep your kitchen healthier, reducing the risks of allergies.This cooker hood filter is made of AC 40 quality charcoal, which absorbs odours is 2x better than that of a traditional charcoal (AC 20). Also, the auto-extinguisher guarantees totally safe use (conforms to standard UL94: V-2). To ensure its top performance, it is advised changing the filter every 3 months, or when indicated by the item colour.