Hi Hack, I'm kind of in the same boat as you are, either I go with the princess or with the king on a 6inch chimney 27 feet tall basement install...Can you tell us how do the king and princess compare in your setup. How hard are you pushing the king to meet your needs? What burn times are you getting with the king compared to what you were getting with the princess to meet your needs?? I need to choose a new "set it and forget it" stove for my basement install because right now I have the "Ultimte JA roby" stove...while it does heat, it is not very efficient and going to the basement to adjust the air is getting kinda old for me... The ja roby ultimate is like 4cf....and I pushed it hard and had no problems whatsoever...therefore,I'm guessing I wont have any issue with the king 4.3 cf...(well the only issue being code compliance...) Let me know, thanks.