As somebody who has one, here is my experience. I have a central boiler 6048, 500,000 BTU. I do not need to split anything. Depending on the diameter of the wood, and type, I cut in 3-3.5 ft lengths and heave it in. It helps that I am 25. This unit will take a bigger piece of wood in the firebox than I can physically lift. I fill twice a day because I am **** about it and it seems to burn less wood that way. If I filled it plumb full I could go a full day easily. Best investment I ever made. This is my second winter with it and it is already about 1/2 paid for by what we are not using from propane. I currently only heat my home with it and eventually will be heating my shop with it, if I ever get in insulated. I have about $10k into it, pipe, pumps and everything. I also have 400+ acres to get wood off of, for free. I went through about 16-18 cord last winter and expect to go through about the same, although I haven't quite figured out a system to keep track of it acurately. I am also currently using my 4wheeler and a home made trailer to haul everything and it takes a long time to haul that much wood when you are maybe taking 1/4 cord at a time! Working on building some bigger equipment to be more efficient.