I've been concerned with the size of my splits. I was worried that they were to small and were burning up faster than if they were bigger. So back in June I split 3 cord of ash and cherry. I split it almost double the size of what I was splitting everything else at. I have 12 cord of oak all split around 2x4, 3x3, 3x5. This stuff is about 4x5 or 5x6 and even 6x6. It is next in line to burn and is down to 22-24% mc I went out to take a peek and this is what I found,. It's hard to see in the picture but There is about a 8" space from the bottom of the black split to the thin layer of coals on the bottom of the firebox. I don't think it would have dropped had I not gone out there. And probably would have burned out leaving all that wood suspended.