I did 8 cords. Cut down during last winter. Hauled out in the Spring and split all summer. I have a Quadra-Fire and a Vermont casting. last winter I burned 200 gallons of oil and that was for hot water. I burned all 8 cords but the house was never cold. Oh yeah, I split using a 208 splitter.
For those who don't know a 208 is 2 arms and an 8 pound splitting maul.
