Andrés Bernal

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since Apr 17, 2018
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Im an artist living in a very special jungle jumping from farm/conservation efforts to art creation in both the digital and physical realms
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Colombia - Tropical dry forest
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Recent posts by Andrés Bernal

creosote burns at 1300F - best heat through science!


49 minutes ago

Free Heat Combo - The Free Heat Movie + The 6 3D Plans Bundle


Free Heat is a 2 hour and 18 minute film that explores the world of rocket mass heaters, a highly efficient and environmentally friendly type of wood-burning technology. The movie follows the experimentation and implementation by a team of experts working on various types of rockety contraptions. Viewers will see firsthand the innovative ways in which the rocket systems are being used and developed, and will learn about the many benefits of this technology. Whether for heating a home, cooking a meal, or creating a relaxing sauna experience, rocket mass heaters are a versatile and sustainable technology.

Watch the movie trailer here:



In the Free Heat 3D Plans Bundle you’ll fine step by step instructions on how to build:
- A pebble style 8 inch j-tube rocket mass heater
- A solar food dehydrator with rocket boost
- A coaxial heat exchanger
- The rocket cooktop with Lorena option
- The tiny house cob-style rocket mass heater
- The sauna rocket heater





Penned by Rocket Mass Heater authorities Paul Wheaton and Chris "Uncle Mud" McClellan and updated Summer, 2022, this eBook features a heap of information about heat risers - how to build one, what to use, how much to spend, how long it'll last.  All this info for the first time in one place! Pages: 22 - Format: PDF


Heating Greenhouses using Rocket Mass Heaters with Uncle MUD ft. Paul Wheaton


Uncle Mud (aka Chris McClellan) raises free-range, organic children in suburban Ohio. He has been using natural building as his soapbox to preach self-reliance and community empowerment, since 2004. Building houses, pizza ovens, and woodstoves with mud and junk is his way of sharing the Can-Do spirit. He writes, teaches workshops and hosts a mud pit and DIY building demonstrations at Fairs across the US. unclemud.com





In this in 1.5 hour webinar PLUS Q&A you will have the chance to learn with a professional rocket mass heater and cob building specialist who will walk you through step by step what you'll need to know in order to build an efficient greenhouse powered by a rocket mass heater.



This step by step 3D set of plans serves as a comprehensive guide for constructing a modular rocket heater, detailing the rocket engine component specifically. This innovative design was developed as part of the Low Tech Laboratory initiative and at the 2022 Permaculture technology Jamboree by the instructor Uncle Mud. Please note that the plans for additional modules, such as the kiln and rocket hot tub, are provided separately.


1 day ago

Some call it "carbon neutral," others "carbon negative." Heat your home with yard waste and cardboard while reducing global problems - we call it free heat.  See our official page at





Rocket Mass Heaters are possibly the most powerful solution to many of the problems confronting individuals and the global population today.  For individuals, Rocket Mass Heaters can save thousands of dollars and bring greater comfort. Around our world, if a billion people used Rocket Mass Heaters as their primary source of heat, it would solve a list of global issues. The only barrier to this solution is . . . knowledge.

      Last fall, I hosted an event called the Rocket Mass Heater Jamboree, intended to offer this revolutionary and accessible home heating technology to the world and cause massive positive global change. The event was a smashing success. The cameras were rolling. We collected gobs of high-quality video of many different kinds of Rocket Mass Heaters and other Rockety contraptions.

viewers will get a front row seat for all of the following builds:
-A standard, 8 inch, pebble style j-tube rocket mass heater.  This is a basic, yet incredibly high performing system.
-A 6 inch cob style j-tube rocket mass heater in a tiny house. Great heat in a smaller footprint.
-Lorena style rocket cooktop - heats a flame-embedded pot super fast, then heats the cook surface.
-A cottage-style rocket heater (with no mass) for a rocket sauna.
-A solar food dehydrator with a rocket assist for when the sun goes down.
-Installed the Liberator, a commercial product from the USA.
-Installed the Gamera, a commercial product from Bulgaria.

Other activities captured for the film:
-The basics of RMH design, build, safety, function, and maintenance.
-5-minute riser - a cheap & fast, readily available heat riser solution.
-Juice box stratification - a scheme to squeeze out a little more efficiency from the already breathtakingly efficient 8-inch system.
-An attempt at a rocket kiln/forge.  We fired some clay and melted some aluminum - a step toward more sustainable ceramics and metal-working.



1 day ago