3-4 cords per yr, in a Lopi Endeavor, the cleanest burning stove on the market, I think. Plus some in an insert that needs replacing with another certified stove.
I burn whatever we get from tree jobs, except the pine, cottonwood, poplar, willow, etc junk. Doug fir is very nice, big leaf maple ok, alder easy to split and burn, but low heat value; apple, cherry, locust, ash, oak, and madrona all are great. Madrona is appx 5200 lb per cord green, and 4300 dry!!)
It isn't all that cold in Seattle, but wood is all I use, haven't had any oil in the furnace for 6 yrs or so. I have a small residential lot, so the seven cords I have are stuck all over the place...