Chimney
Structure that provides ventilation for exhausting the hot or toxic flue gases, aerosols and smokes produced by a boiler, stove, furnace or fireplace inside a building to the outside atmosphere
A chimney is an architectural ventilation structure made of masonry, clay or metal that isolates hot toxic exhaust gases or smoke produced by a boiler, stove, furnace, incinerator, or fireplace from human living areas. Chimneys are typically vertical, or as near as possible to vertical, to ensure that the gases flow smoothly, drawing air into the combustion in what is known as the stack, or chimne... Wikipedia