A structure for venting smoke, such as from a fireplace or stove. The term is straightforward and neutral.
煙り出しから煙が立ち上っている。
Smoke is rising from the chimney.
Compound of 煙り (kemuri, 'smoke') and 出し (dashi, 'letting out'). The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning.