I haven't had to deal with a wood burner since the late 70's in my auto repair shop...Long story short, I was able to access cut-outs from an old buck stove and welded it together. .. 7 inch sched 40 water pipe exhaust...If it would burn,,,,I burned it....But ,that was the "good ol' days".. My wife and I been researching different brands and types of free standing heaters now and down to deciding one with a cat or just a secondary burn....And between a cook stove or one just for heat. Not a lot of cooking room on most of the heat only stoves... For a 1700 sq ft ranch style... Average coldest temps in the upper 20's. In foothills of NC. ..Any suggestions would be appreciated and thought out .