I also read something about the following and it works great. I cut my wood 21 inches. The reason is that is what I cut it for my insert and I had right much already cut when I bought my OWF. I try to let it burn down to nothing but ashes and a few coals. When I stack my wood in the OWF, I stack it in the front because it burns from the front to the back and usually burns up better. If I stack it in the back, it cools down and the wood doesn't burn up as good. Just a tip that you may find works for you.