Paul and Matt Walker continue their smackdown on the merits of J-Tube verses Batch Box style Rocket Mass Heaters, and although they’re neck and neck in terms of efficiency, they differ when the fires out and the J-tube scores a couple of wins with plugging and simplicity. But no dampers in the chimney, thanks. Support the podcast on Patreon Show notes and discussion More information and discussion of this podcast on this thread at Permies.