Hi all! New member here and unfortunately an unhappy one! I have a hotblast stove (1500) series I believe.. all the tags and decals are removed so I'm not 100% on the model. Any how, it is in the basement and no matter how hot the fire, when adding wood it blows huge clouds of smoke back into the room. Secondly, if not a hot burning fire, occasionally it will seep smoke through the vent in front door, on some occasions even out the dampener on the very bottom ash tray door. I am desperate to get a fix for it, and in dire need. I have tried adding 4' of chimney to the pipe(already 3' of peak of roof), also clean the chimney every year(it's never very dirty). I have opened windows, pretty much any trick I can figure out and cannot get it to stop. My fireplace in my living room, the next level above this furnace, does not have any draft issues what so ever. Any ideas of what I may be able to do?