[video=youtube;La_215QIT7E]https://www.youtube.com/watch?v=La_215QIT7E[/video]
Wood burner is winding down, house is warm.
We run it for 9 hours in these temps. I think the longest we've run it was 14 hours when the weather was sub zero. House is 70 now, but it will drop to 63 by tomorrow morning.