Just a noise I heard today. Wind is blowing between 20-30 mph so draft is better than usual. Anyways I built a fire awhile ago and noticed a rumble in the stovetop/chimney area. The fire wasnt hot enough to get the afterburn going, but the flames were building nicely. Basically Im asking how the Castine is made, if the flames go directly to the chimney or is there an internal baffle?