Rocket Mass Heater Part 2 | Mud Pizzas

Phew! I have never stomped on so much mud in my life! We still have a bit more cob to make to really finish off the rocket mass heater, but being able to heat our cabin as the days become colder has been great.
The Rocket Mass Heater Builder's Guide
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[@suhspicious]

Love it as usual guys! Glad you went with no music for this!! I love the sounds of you guys working, it’s very relaxing after a busy day of running around and the noise of the world, it’s a nice way to slow the sound down!

[@johndowning2231]

As I recall from my childhood in Wisconsin, that green plant’s name is “Princess Pine”.

[@d.g.n9392]

That’s some major volumes of mud mixture. That fire draw is very strong. I’ll look forward to a later video as you have more time go by. You guys working so diligently. Your St. Louis viewer here. Watching on our screen porch, listening to crickets and tree frogs in the night. Great video 🙋‍♂️🐈🐈

[@FiddleheadAcres]

Thank you!

[@glendamott6420]

Can’t wait to see what’s next .

[@offgridhomesteadthemudpuddle]

Wow, super cool😊😊😊

[@brantleytinnin6258]

Subscribed

[@PEBelarus]

Honestly, I don't see why people like top lighting. I live in a place with a traditional Russian mass stove and the problem with backdrafting is solved simply by starting your fire a little deeper inside the box. Even if the fire does start to draw forward, slightly closing the door creates enough draft to begin the draw. And it is so much more convenient to build a fire with horizontal access as well as withdrawing ashes for use in the garden. Also, I think most people dump a lot of perlite directly under the pipes to protect the floor. And finally, I would use a mixer instead of grape stomping. Traditional is nice but a hundred trips of anything is ridiculous. Cheers.

[@grannybearsgarden]

I’ve been watching the small bits on TikTok, but it’s good to see a longer, more in depth, video. Very interesting build. I look forward to seeing it finished.

[@FiddleheadAcres]

Thank you!!

[@MrSpondulik]

Hi, anyone know the theory of how long the exhaust pipes can go before losing effiency? IE, losing draw and temperature.

[@quantumofconscience6538]

Mineral wool insulation (noncombustible) comes in square / stiff sheets. That's best to protect the floor under the firebrick (part 1). - Also, a stove pipe heat riser needs insulation in the barrel..... but I doubt a fire brick mini chimey needs insulation. What cool air could possibly "penetrate" through the fire brick as it's rushing by on its way out, and the air rushing by is probably 400 degrees! .... Insulating... against 400 degrees?

[@davidsosna5913]

I'll start by saying I think you guys are awesome. I have some questions about the "cob" you are making for the bench. At first, when you were slopping it on, I even thought that was too wet a mixture. Then, later, when you were literally pouring it out of the bucket I thought that is unlike any cob I've ever been taught. I know you did plenty of research and used that book you recommend. Is this the consistency of cob you researched that was appropriate for this application?

[@FiddleheadAcres]

It was too wet but it cured fine and hasn’t cause issue for us

[@loganm8298]

Thank you for this! I’m also in alaska looking to build one of these. How is the sandy clay holding up as it dries? I’ve haven’t had much luck keeping it together. I was thinking of mixing in some high temp mortar to help glue it together. Looking forward to the next video.

[@FiddleheadAcres]

So far very well! It will rub off if we run our hands over it and we have some cracking because we didn’t use straw or plant material in most of it but that’s an easy fix. Once it’s sealed with the linseed oil it’ll stop rubbing off as well.

[@InsuringUrFuture]

How would you be able to tell when the cobb is dry,

[@patrickkraemer8905]

Any Updates? Is it efficient? I didn't quite understand the barrel removal. For tile placement? Will it keep you warm in really cold weather?

[@FiddleheadAcres]

Next week we will be talking more about it but yes it is very efficient! Barrel removal allows for tiles and for cleaning. Yes it will keep us very very warm!

[@jdram58]

Well right or wrong at least I can see your process and I know sand is part of the heat bank n Id prefer to build some sort of box to house all the materials so if I mess up I can try again its interesting cuz other then the pipe urs looks more according to actual plans Ive seen verses more modern versions.

[@skeets6060]

Interesting but what does your Ins man say about it ?

[@FiddleheadAcres]

Can’t get insurance on a house like ours anyway

[@JayWoodford]

How long did it take for the cob to dry?

[@TheSaskachewan1]

Why did you insulate the heat riser?

[@randyrosy]

How do you blow your nose without getting stuff stuck to your jewellery?

[@FiddleheadAcres]

Normally.

[@bobhalt536]

How do you know when you are done stomping?

[@FiddleheadAcres]

Mostly based on texture and color! In person there is a good color difference between the sand and clay and what they look like mixed so you can tell when it’s all incorporated!

[@dktex]

What shape were your hands/skin after that?

[@FiddleheadAcres]

Not as bad as you’d think!

[@douglaspohl1827]

Don't see your calculations... shooting from the hip is ridiculous... do the math... likely just need to season 200% more firewoord for next year... always a year ahead to allow drying...