I own a fire place that separates the living and dining room-open on both ends. Smoke comes out on both ends
Answers: Sometime if the wind shifts you might obtain some smoke...but it will definitely come out surrounded by both rooms.
You need to unstop the flue, or if you did that already, ensure that the chimney is not clogged. Many times leaves get stuck surrounded by the chimney - sometimes birds and squirrels can clog it up with nests and ruins.
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