I've had a wood fire in the stove in the barn two or three mornings. I have a waste oil heater in the style falconvan's doing, but I need to put in a second chimney for it to get it going again. Mike's details have got me interested in getting it going again, maybe with a bit more sophistication than it had in the trial mode, but it worked pretty good with a five gallon bucket about ten feet above grade, flowing into the old hot water tank. Got the walls of the tank glowing red a few times....