I bought a house end of last year and have been wondering why the extractor fan in the kitchen was so rubbish, I assumed it was just because it is as old as the house (25 years ish). It has just become apparent it is one of those recirculating fans, as the hob is on the party wall with the house next door. My quick research suggests this type of fan is utterly useless which doesn't fill me with hope. We can't look at changing the type of fan until we rip out the whole kitchen which is a longer-term project, also our boiler is on the external wall where we would ideally duct to, so I'm not sure how we could even achieve a proper extractor fan. Does anyone have a recirculating kitchen fan that actually does anything?