Charcoal FiltersThere are two filters fitted to a cooker hood when they are new, a grease filter and a carbon or charcoal filter. Not all hoods have both fitted but every hood will have a grease filter of some sort to stop airborne grease from entering the motor and electrics of the cooker hood.
It is therefore important to the proper operation of your cooker hood that the carbon or charcoal filters are replaced periodically and many now come with use indicators that tell you when it is time to change the filter.
Carbon filters need to be changed periodically and we recommend every 6-12 months depending on the type of cooking that is being carried out. i.e. if you steam cook you will have to change the filters less often but if you do a lot of frying you will have to change them more frequently.