The Wpro cooker hood carbon filter C00380051 is powered with a professional filter with absorbent action that protects against the spread of bacteria in the air. Your kitchen will be healthier, the risks of allergies are reduced. The performance is increased with the AC 40 quality charcoal. Its ability to absorb odours is 2 x greater than that of a traditional charcoal (AC 20). The auto-extinguish feature guarantees totally safe use (conforms to standard UL94: V-2). To ensure optimal performance, it is recommended to replace it upon its saturation indicator colour change.