![]() ![]() Henceforth, anytime some particularly negative person wants to say "If rocket stoves we're so great." We all can just point to these test results, and show them the proof. These test results also vindicate every rocket mass heater builder and espouser, that has battled for years to get the recognition and respect they and this technology deserves. Not bad for a gravity fed non-catalytic rocket heater with a 4" core! This is actually much better than I had originally hoped for. At 0.38 grams per hour of solid particulate, we're barely behind a catalytic stove and an electric pellet stove. And I can testify, the insulation went a long way towards improving the burn! the EPA certified testing lab concluded their emissions test results on the Liberator Gen 2 Rocket Heater this week, and we have the third cleanest burning room heater in the world. A replacement fireglass door for the Gen 2 is something we would like to introduce next year. So for this heater, we decided to include ceramic refractory fiberboard insulation into the design, a removable cooktop plate to facilitate easier cleaning and maintenance, we nixed those old ugly cooling fins that reduced efficiency, and now offer custom paint colors. However, we received a lot of helpful feedback on the drawbacks of that design, particularly the lack of insulation on the combustion chamber and riser. And, just like the previous Gen 1 Liberator Rocket Heater, we're fully building code compliant to UL-1482, ULC-S627, and additionally, ASTM-E-1509 for pellets. ![]() The first bit of news is that we're introducing a second generation Liberator Rocket Heater. This heater has been in development for a long time (some, including myself, would say too long) but the wait has been worth it. Some of you guys may already be familiar with the Gen 2 Liberator Rocket Heater from the video's that Chris "UIncle Mud" has published, linked below. Whilst I'm thinking about it, I wanted to give out some updates as to whats been happening on our end. ![]() There is a bright future to be had in this regard. I always knew that 8" core rocket mass heaters were good, but I didn't grasp how much better they were until I experienced it in person. I got to fire up Pauls Rocket Mass Heater in the Fisher-Price House, and it was a very inspirational moment. I look forward to attending the next Rocket Mass Heater Jamboree as well. It was an excellent time, even if I was only able to stay for a couple days. I also got to see and test the Gamera Rocket Heater, a well built stove, hands on and in person. I got to meet Paul Wheaton, see Chris "Uncle Mud" again, and meet face to face with many of the other builders and some people that were interested in the Liberator Rocket Heaters we produce. Īlso, be sure to check YouTube - lots of videos there.The 2021 Rocket Mass Heater Jamboree was a blast. That's a good place to start to get a feel for how these things work. Here's a good Instructable you can follow to build one out of soup cans. You can use just about any found materials that can tolerate the heat and provide insulation where needed. One way is to light the fire in the chimney, then start adding fuel the regular way. You have to get the chimney hot to make it work. This will create turbulence that will mix the gases and air for better combustion. You asked about principles, and one is that the bend to the chimney should be sharp, not a gentle curve. You can add a second 90-degree bend to make the whole thing U-shaped, but the chimney must be much longer than the fuel end, so it will draw the exhaust in the right direction. To create a functioning rocket stove, you need an insulated J-shaped chimney. You can also add a skirt around the pot, so the exhaust gas is held close to the sides of the pot, further improving heat transfer. The cooking pot sits directly over the chimney, so the hot exhaust hits it directly. The chimney is insulated and gets very hot, which helps burn more of the gases of combustion, producing more heat from the same fuel. The basic principle is this: use the draft created by hot exhaust in a chimney to suck lots of fresh air in to the fire. While rocket mass heaters have become popular in the USA as an efficient way for hippies in cob houses to stay warm with very little fuel, they originated as a way to cook when wood fuel was scarce. I am by no means an expert in rocket stoves, but just in case we don't have a rocket stove expert here, I'll offer what I know. ![]()
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