One reason a fireplace will smoke is lack of air. It's easy to check if if that is the problem. Open a nearby window to create a draft and see what happens. If this is the problem, the air coming in the window will feed the fire and allow it to burn hotter and cleaner, sending smoke up the chimney. In an airtight home, you may need to open a window just a smidge any time you have a fire, an upstairs window is best.

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