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Rocket Mass Masonry!!! And the new Stone Age...

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What's a Rocket Mass Heater without a bell?

What if it was made of stone and still trapping the heat and then routed to be a convenient cooking surface?

We've opened our outdoor laboratory to not only to make a Rocket Mass Masonry which has a stone bell but also design it to be a simple convenient oven or stove top! A Rocket Mass Heater elevated to become a central cooking mecca.

We're inspired by the recent Gymse heater oven by Lars Helbro of Denmark and think this simple, cheap, and versatile!

There's also no compromising the basic qualities of high efficiency, clean burning, easy handling for the user, one fire per day and 24 hours of heat. It could work on any available chimney flue size, it has the potential of condensing operation, and can operate with the door open (or without a door at all!). Since it can be made from clay and almost any kind of stone, it is designed to be affordable as well.

Third generation stone mason, Eric Moshier, has a rock solid foundation in masonry, heaters, and ovens and will be demonstrating these concepts along with outdoor oven and general stone masonry skills. With over 30 years of experience, he has built Finnish, Swedish, Russian and German style masonry heaters and ovens throughout the Midwest and southern Ontario.

If anyone is interested in joining us, we'll be getting our hands on a lot of great masonry moments this year along with many other exciting natural building and permaculture immersions.


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Heat, cooking, and structural.
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Used for cooking.
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Heating a bench
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Location: Northern Ireland
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Those look really nice! Any issues in relation to building control regulations (you know the way the EU is a bit hyper on these)...
Chad Johnson
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Hi Shane, I'm unaware of any code problems with these builds.
Right! We're on it! Let's get to work tiny ad!
Rocket Mass Heater Plans - now free for a while
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