I noticed that the BioBrick web site states "One pallet of our BioBricks(TM) brings as much heat into your house as one cord of wood*. That's one 4'x4'x3' pallet of BioBricks replacing a 4'x4'x8' stack of cordwood.. " By my calculation, a pallet of Bio bricks is 2000 LBS. (50 40LB packs) So How can 2000Lbs of compressed wood have more BTU that 3500 Lbs of real wood? Can it have more BTU per LB? I know its handier and neater and has a lot going for it but more BTU per LB?