Cookology CF150 Carbon Charcoal Recirculating Extractor Fan Cooker Hood Filters This pair of CF150 Filters is required for our Cookology Cooker Hoods when you are not ducting the air in your kitchen outside via a vent for instance if your cooker or hob is against an internal wall. Carbon filters help absorb smells from cooking before it gets recirculated back into the kitchen. These filters fit the following models: CGL100SS CGL100BK