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Extractor Fan For Island Hob If you have an island hob then you will require a specialised extractor fan to fit above it. These work by aerating the space by pulling moisture, smoke and odours far from your kitchen. A ceiling extractor is a streamlined option that sits flush with the ceiling and is created to mix in. These work by recirculating air through charcoal filters so they can be fitted without the requirement for ducting vents. Induction hobs A popular alternative to gas hobs, induction hob