Cant take a good picture unless I hold my iPhone too close to the fire, but the bed of coals can be quite deep inside the barrel of the stove.
It can run for a couple of days, but it prefers to be tended once or twice a day for a nice even fire.
We will start it up sometime in November, as its still pretty warm here on Cape Cod until around Thanksgiving.
We have two of them, so if we have a problem with one, we fire the other up.
You can see the approx level from the picture, tho we tend to run it at different levels depending on the weather and draft.
I think our big KingOHeat will hold around 150 pounds or maybe more.