Maple - Just under 5 a week when its really cold. However as a site contractor I get paid to clear and remove the wood from my customers sites. All of the wood is processed from the comfort of my excavator. I heat 2 homes an office bldg. An autobody shop and my equipment repair / welding shop. At one time it was propane that wasn't fun! It was like paying cash for a new car every year. Literally, I'm not joking here!
stee, I'm not trying to win awards for anything. I can however tell you this unit is much more efficient than the cb pallet burner I had before. We have a splitter that mounts on a skidsteer that is used, with the amount of wood we consume it is difficult to get ahead sometimes. Some years in the past we have this winter we have not! lol -10 here tonight without wind chill!
Maple, thanks for the suggestions. Contrary to what's been stated, I am interested in efficiency. We try and use seasoned wood, even a few years back when we had the non gasing central boiler. Some years we can stay ahead, others it is difficult. A lot depends on the construction season as to when we are producing the timber clearing for a sub division as opposed to a water main project etc. We try and keep a year ahead but that's beyond our control. In the post I was merely saying that it is possible to gasify green wood, but I agree burning water isn't very efficient lol. We use a massive amount of wood, but it replaces a massive amount of LP. I could buy myself a c class Mercedes every year and give it away at the end of heating season for the cost to use propane. We tried a fire brick lining in the primary burn chamber - that's how it was constructed. Even with the increase in combustion temp the heat exchanger didn't have enough heat exchange area to keep up with the demand so we removed the lining. We have the aquastat differential set at 1 degree it doesn't cycle off for more than a couple min when its below 20 degrees outside, it is almost a constant burn. So in saying that, I guess it is sized fairly accurately.
