Pellet stoves aren't AFUE rated, which makes the manufacturer's published BTU output data suspect. Has anyone conducted any measurements on their pellet stove to determine an overall efficiency rating? Or, would anyone at least care to take a SWAG at what a new stove's efficiency might be? For what it's worth Quadra-Fire's web fuel calculation cost web page implies an efficiency of 70%. What with the price of all sorts of fuel spinning wildly out of control, I'd like to compare a pellet stove efficiency to my (new, recently installed) oil hot air furnace.