Niel Liesmons · 2w I have some mass too btw. Seeing temps go from 800° C to 48° C at chimney exit :Check: . Besides that small-medium I have, most houses are insulated enough these days to not need crazy big rocket s... Adam Snyder @Adam Snyder 1770226485 Great video, I really like the somewhat modular build. Did you just play with stuff until it worked or were there books or plans you started from? 1