I am looking at three possibilities and I have an internal chimney in the living room with 2500sqft to heat. I will be burning pinion since I have an endless supply. The chimney is in the center of my ranch home but I am worried about heat getting to the furthest bedroom. I was told to open the window in this room from the guy at woodland direct and the heat would be pushed down there if the other windows were sealed. I can get a new osburn for 1400 and the others are 1000 more for the kuma and 1500 more for the quad. The home is brick and has pretty good insulation. The average lows for my city is 20 in Jan. It rarely gets below 0 here.