That's impressive. last night I left it at about 25% and when I walked back in the stove was rumbling and the cat was over 1600. This was after an hour or two past a hot reload. I cut the air and it settled around 1100 so I could go to bed. Needless to say the stove cooled but the burn lasted about 14 hours. It's warm today so I just opened the bypass and there's still a thick bed of coals 17 hours after the hot reload.