We have an outdoor furnace....had it installed about 5 years ago or so now I think. I can't remember the company that we bought, but it was a Canadian made one....and we got a bigger one than we needed, just in case Dad decided to heat his shed with it....
It's alright....we used to heat the house with 2 'indoor' wood stoves. I miss the 'hot spots' that we had with the wood stoves....so on a reaaallllyyyy cold night (or just too long outside in the snow) you could curl up near the stove and warm up! Plus the chimney went through the corner of my bedroom, so it was always TOASTY (now I sleep in fleece pjs, flannel sheets, about 5 heavy blankets and a duvet on top of it all in the winter).
The outdoor furnace does heat more evenly....and it even kept the basement warm enough on most days (unless it got to -15 C for a couple days in a row), that I could comfortably do my work there.
We do have access to more wood than we can use, having 3 woodlots on our farms. And Dad cuts our wood to 4 foot lengths as much as possible (depending on the diameter of the wood of course). Ours usually only needs to be tended to once a day, though now that we have the new shop with infloor heat being fed from the outdoor furnace, we might find a bit of a difference to that this winter. My Dad tells anyone interested in getting one, that unless you have access to your own firewood, it is not worth getting an outdoor furnace....at least not in this area....
~kathryn