I bought a 1500 sq foot open concept house in the seacost of NH which came with a Jotul combifire #4 in the center of the house nicely set up. Its my first woodstove experience, and has become the main heat source for the house. It's able to keep us as warm as we want, and we have the good fortune of a huge woodlot with all the wood we need in a reasonable mix of soft and hardwoods. Aside from having used this for a couple of years, and having had a licensed sweep clean and inspect everything, I don't know anything more about the stove. For example, what were its design principles, attributes etc. Anyone have any info?