Over the past few days my wife and I got to test drive the Thelin. I know it's early in the heating season but it did get down in the high 30's. Like 39???? We love the stove. How easy, how convient. We feel good about not using as much oil. We feel that pellets are a very "Green" solution for heating. It's nice to see how much it costs for heat for a day by seeing what's left in the hopper. The stove throws out a boat load of heat even raising the 2nd floor temps by several degrees. I am pleased that I do not have the stove in the room that we spend the most time in. We have it in an ajoining room. This set up lets us crank it up without getting roasted out. We have only run the stove on medium so far. I wonder what high is like????? Anyway, thank you to all in here that share opinions, information, encouragement and complicated mathmatical formulas and equasions. It makes a difference. Very Cool.......