If a ton of pellets are about equal to a cord of decent wood they are now cost effective for a wood type burning appliance. Ideal perhaps for flues that would be marginal or dangerous with wood.
We always thought a cord of good wood burnt in a reasonably efficient wood appliance was equal to approx 100 gallons of oil. May be a little less oil today as the efficiency of oil furnaces has increased over the years.
Having watched pellet stoves burn the pellets seem to be glued together and I suspect the glue adds to the clean burn.
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