I have seen posts about people using real big splits the kind you can only get like 3 in the stove total. Last year I really didnt have real good and dry wood but the wood I had worked but it was not ideal. I tried this recently instead of raking my coals forward I just spread the coals out and had a pretty decent depth of good hot coals, I'd say about 3" deep. So I loaded the stove up with 3 huge splits, Splits that were good and dry. The 3 huge splits filled the stove pretty good but not like I could pack in small splits. There was more room up top around the secondary tubes. I was skeptical if not having the stove completely full if the stove wood burn all night plus loading on such a coal bed would make them burn too fast. My thought was the bigger splits would burn slower on the deep hot coal bed and not over heat the stove. Plus I made sure I got the air turned down in time not to let things get too hot. It all worked really well , I got a 9 hour burn with a stove load with just 3 splits and the stove not packed full and loaded on such a hot coal bed. House was a nice and warm 71 in the morning when I got up. Big Chunk Good and Dry wood is a nice option to have. All 3 chunks were Red Oak. One of the splits was a chunk like 8" by 9" 20" long .