Rocket Mass Heater- New and Improved!

So after our last post we found that our RMH needed an overhaul. Too much smoke-back, it seemed to be choking, the pull of the draft was weak, so we went back to the drawing board… actually we just pulled off the barrel, put on a couple more layers of brick to the heat riser, insulated it, then tore down the ash-pit/manifold where the barrel releases the gasses into the duct work to make the transition smoother. The way we had it, the gasses had to make a 90ยบ turn, than another sharp turn into the ducts. So we fixed these two things and sealed it all back up, and fired it up at nearly midnight on 2013-12-28, we were so very pleased with the results! Then yesterday we made some changes to the duct work outside where the exhaust/smoke comes out of the enclosure. We eventually want to build a little room around where the ductwork comes out of the enclosure and make a little “seedling” room and use the heat to nurture plants, while also protecting the end of the exhaust from wind blow back. Well, so we don’t have to worry about building the seedling room till closer to spring we redirected the duct work strait up and put a chimney cap on it. This made the system run even better doing it this way, so we just might leave it. We’ll see ๐Ÿ™‚

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