Here is a picture of some of the ones that I would use for overnight. While I am splitting I will split specifically for overnight. The rest will be regular splits and will be any shape.. pie shaped it doesn't matter to me its for the day and during the day the stove burns more evenly because the air is not turned down more than half way until the coaling stage.
Today I woke up and lit the stove. It was to warm yesterday so I let it go out.
I lit the stove at 5am and got it up to temp and got the cat engaged. and added 2splits of wood and l let it run for a bit letting the cat run like 900+ a little bit about 6.15am
Then I added alot of wood big splits and filled the box almost to the top.
I let it catch a little and closed the damper let it run for 5 minutes and then turned the air back to half way and let the stove go till all the wood went almost to coals. The box is filled almost half way with coals at this point. At about 11am with the box filled with coals I turned the air down all the way as my house was warm enough like 75 in the stove room.. 71 in the hall to the kids bedrooms. its is now 4.12pm and the temp in my house has dropped some as it went down to 22 degrees at my house this morning. There are still active coals at the bottom of my stove and my cat temp is 228 degrees. I will soon rake the ash, drop some small splits on the coals get my cat going and then load it up for the night and let it go. There are a number of ways to run this stove, this is just how I run it sometimes. You will need to use different techniques based on how cold it its outside and the amount of heat required.
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