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My bet is that if I heated my home with a wood stove, I'd need at least 4 cords, and probably more like 6-8.
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1 cord is 3,62 m3. we use 2-3 cords of wood per winter to heat our home. I don't understand where you burn 8 cords of wood unles you live in a warehouse.
Depends on the stove actually. I'm talking about a modern wood burner you light up and stock like a old school stove, but has much better insulation and heats the house by heating water for the radiators, not by radiating it into the room. Even when the fire dies down, the amber heats the water and even when amber turns to ash there's enough hot water in the system to heat the house for another couple of hours.
OK, if were talking about the USA, we can leave out California, Texas, Florida and all other warmer states. You can half the amount of homes that will go for wood heating.
So now we need 1.43 billion trees per year. Average density of forrests in Slovenia is somewhere between 500 and 600 trees per hectare* and roughly guessing one fifth of them is over 5'' diameter in a area of 1.816.000ha, so that is 200 million or more trees. A country smaller than New Jersey would provide one seventh of your needs and still wouldn't resort to clear cutting. One tenth for argument sake, there's to much variables.
And you don't have only 5'' and saplings in one hectare, you have mixed sizes. Trees that are too small this year will be good next year and so on.
It's not a solution, but can ease the problems. A tree grows 25 years, oil or coal needs millions.
*page 33
http://www.digitalna-knjiznica.bf.un..._uros&ines.pdf