The trouble is, while I have receipts and tracking to show exactly how much oil I’ve saved, I have kept zero records of my wood usage, over those time intervals. I know that I’m into my ninth cord this year, and I can add that to my oil usage for this year, but I’ll have to back out my heating degree days for this year versus an average winter. We have had a few screwy winters in a row, here.
Yes, I should have a larger tank. My last house was 1/3rd the size of this place, and we had 550 gallons in the basement.
I’m not sure this is accurate, either. But you’re right, closer than just 113 gal per cord. I’ll burn about nine cords this year, before I need to let the stoves go cold and get on with spring time stuff. It’s about 90% oak, with other misc. hardwoods, but without knowing the MC% of each species (namely the oak), you’re still guessing at BTU’s. It’s just not worth the effort to figure it out, IMO.