I explained to my wife that we could just make a smaller fire in the Oslo, but she is worried that it'll blow us away. In checking the measurements, since the Oslo is 4 or 5" greater in depth, we might have to move it closer to the front of the hearth for clearance reasons from the back, even with a heat shield. So in the end, went with the blue/black enamel Castine and should have it in place in 5 days. The firebox is just a bit bigger than my Century, and should be MUCH more efficient. As mentioned earlier, the Century shows a top output of 30k btu's with the Castine at 50k....the Castine will be plenty of stove, just wish it had the side door..........thanks for the help...............Paul