Please don't flame me for my ignorance because I'm sure that is what it partially is but after all sorts of study with my wood and my stove I'm getting more and more convinced that overall I get more heat out of pine than out of hardwood. Granted I have to load the pine MUCH more frequently but whereas pine will start flaming super fast and make my secondary system go absolutely wild with flames like flamethrowers almost all throughout that load, the hardwood will start slowly, make my secondary system lazily loaf along as compared to the pine, and then go to a long lasting coal stage that simply won't allow me to reload the stove as frequently. Now I really do recognize all the science that states that hardwood has more btu's per pound but in reality in terms of the overall burn and the ability to stuff more pounds per hour of wood into the stove the experience I have had thus far tells me that overall I get more heat out of pine than out of hardwood. Ohh, just to eliminate the other factors out there I am making totally sure that my moisture levels are about the same, the split sizes are about the same, the loading patterns are about the same etc. In other words to the best of my ability I am trying to follow the scientific method and only allow one different variable. So I'd love to learn the thoughts of those out there with MUCH more experience but so far this is the experience I have had.