I used to burn almost all split wood, but over the last few years have been mixing in some unsplit branches, about 4 inch or so. I know they take longer to dry out because the only surface exposed is the ends, but what are we looking at in general, about a year or more or two? I'm talking Maple, Cherry, stuff like that, not Oak or Mulberry which take longer. I've been collecting them and putting them in my pile for 2 years from now. They are too small to split but are decent wood so I'm grabbing them.....