That’s exactly what I think, too. And even if wood is for free, you need time and effort to handle it. So less waste means less work.
This is another good point of the retorts: It’s much easier to use the “waste-heat” for heating your shed, home or water.
Hello Tom, it is often assumed that it is burning hot on the footplate of a steam loco. In fact, it is only a few degrees warmer than outside, as you are not directly exposed to the heat of the fire. So it’s hot in summer, but could be still freezing in winter.