Originally posted by Gladi8er65:

create an enclosed area, overhead, where the smoke can hang out and eventually dissipate...

Trapping the smoke in a narrow place is indeed very, if not most effective. There's no need for chimneys, extensions or large gaps if you know what you're doing.

https://steamcommunity.com/sharedfiles/filedetails/?id=2932934872

Having a high hall with slowly rising smoke and other features has an atmosphere of its own of course.