Our new extractor is ducted through the ceiling between joists to an external wall. Can you not do the same? Or go full Industrial and have steel duct suspended from the ceiling?
Although I reckon you'd want to have it much closer to the ceiling and you would in a commercial premises, and have some sort of wipe clean paint to make build up of dust and fag less visible /easier to deal with.
Our new extractor is ducted through the ceiling between joists to an external wall. Can you not do the same? Or go full Industrial and have steel duct suspended from the ceiling?