My stove ( jotul f 500 eco ) has a cast iron hearth base, I am considering a brick floor, to understand differences, if burn times will be better and what happens in general. If anyone knows differences maybe I can save time or do this. Currently in the morning, I find ash, some coal still good and some as if it was not burned. We're talking 14 hours after last charge, I don't live in that house ( for now ) I'm doing jobs but I turn on the stove almost every day