I'm the guy who posted a few months ago regarding my "Comforter" which had often burned out of control. Closing the air intake completely would cause "whuffing" (A VERY FRIGHTENING PHENOMENON!). The thoughts and replys on Hearth were calming and helpful. The advice was to forget about long overnight burns and settle for short burns of moderate temperature using two or no more than three pieces of wood. We ran it that way since November. Now something else has happened that is most troubling. The walls and windows throughout the house are covered with soot. The metal element of our Ionic Breeze air cleaner is soot covered every day. We must have been breathing this stuff for quite awhile now. The stove has not been "whuffing", but I am aware that one must open the door very slowly to add wood or else smoke will back into the house enough that people far from the stove will smell it. This stove has a seven inch outlet which has been squeezed to an oval. I conected it with a reducer to a six inch tee with cleanout then to 16 feet of stainless steel flue liner which is insulated and goes up thru the 12 x 12 clay flue. Does anyone have any idea where all this soot could be coming from?