By junk wood, I mean big tooth aspen (most call it poplar) and pine (white, red, jack).
I've been burning hardwood almost exclusively (hard maple and oak). Even with sub zero temps, I can load a small amount compared to the size of the firebox (with a good bed of coals) and get 12 hours burn time. I sometimes throw in a couple junk wood pieces on top of the hardwoods, but when I do, it's only about 20% of the total amount I put in.
My question is this. If I were to be burning just junk wood, would I have to basically stuff the firebox full of it to get a 12 hour burn time? Seems like if I put just junkwood in and used the same quantity that I use for hardwoods, I'd have to load it about every 4-6 hours.
Thoughts?