Roughly 180,000,000 BTU mix of 5-6 cord black walnut, cord each mulberry, red oak, white oak, cherry and elm.
Started out with 268,000,000 btus now I'm down to 174,439,400 BTUs Dec 17th to Jan 17th yes I burned almost 93,903,600 so far in 1 month. Or I made 14,700 lbs go up in smoke. Oak. Heat550 Subzero hard on wood piles. Sent from my LG-H900 using Tapatalk