Had an overnight fire in my 80's buck stove last night. Didn't need to have one today because of the nice weather and the sun heating up the house. To my surprise at 8pm this evening I went to make an evening fire and unbelieveably there were glowing coals from a piece of oak I nestled in the corner last night. I was easily able to start tonights fire from these coals. Thats 19 hours from original start!