Hearthstone Heritage 8022. I'm still kicking myself that I didn't get the next size up, the Mansfield. Bigger firebox would have suited our house better.
Sadly I have about another years worth of 15" wood to burn which doesn't utilize the 21" firebox. Once the 15" wood is gone, I can load the firebox better since I wont have to worry about splits rolling into the door. I should conceivably get at least an additional hour of burn time, if not 2 once I get to my 20" splits or in a couple years get into my shorts bin....
Right now I'm burning pin oak and locust with a little bit of cherry. On the weekends when the stove can be tended to more often its red and silver maple.
Once the secondaries start firing and the stove starts "talking" to me, the primary air gets shut down completely and all combustion that takes place is from the secondaries. Usually keeps the stove between 500 and 550 degrees.