Very nice! FYI - building codes allow for outside rocket mass heaters (like yours) all over the US except san francisco.

I'm 70 year old retired HVAC installer. Well done and I love the out of the box critical thinking with great teachings skills. Young man I'm dieing of cancer and YOU have just made my day. Thank you so much!

the crazy thing is - he answers ALL the questions in the video. I was left with no questions at all. One of the best building videos i've ever seen :D

In my 65 years, I've built many of these. I've got to say, yours is one of the best tutorials on the net, for someone first starting out on this adventure. Well done young man. I know your family will get many years of enjoyment out of your project.

You have the perfect blend of in-real-time video and time lapse combined with unobtrusive background music and just the right amount of exposition to cover the details of what you're doing, just when it's needed. You cover so much ground--and time--without it being overwhelming or boring. You definitely set the standard for this kind of content.

I don't think I have ever watched an hour plus video straight through before. This was fascinating. Your methodical, detailed approach was very educational. You have a right to feel so proud and accomplished over this project.

I have seen 10-15 videos of this type for the J-Type RMH w/ bench over the years, and they all left me with more questions than answers. Not yours! Absolutely thorough in your explanations and I feel that with the literature I have acquired, I am ready to make my first attempt this late summer or fall. Thank you, sir! I don't know if you are an educator by trade, but you have a gift for it.

You asked viewers to subscribe in order to gain the minimum 1k that UKposts requires before they'll monetize your channel, today 9 months later I can see that you have over 120k subscribers, congratulations, your growth is definitely a result of the detailed fine work and video you've shown on your channel and yes you've saved me both time and money, your very well deserving of you achievements, keep em coming!.

Subscribed, liked and shared - you are definitely not crazy for doing this. I’m a 58 years old mother of 3 adult sons, 2 grandsons. And hapilly married to a 64 years old very DIY husband. Watching your video from The Netherlands on 25 Jan. 2024. The knowledge and know-how you share is priceless. Thank you for your generosity. Amicalement, Pascale ❤

My Grandad spent a large part of his life living in Zimbabwe and he built the family home from cob bricks that he made as himself. It had an estimated life span of 20 years...... 60 odd years later, the house is still standing and can be found on Google Earth!! I hope your bench serves you well 😊👍👍👍👍

Outstanding. Son, I've watched a lot of Rocket Mass Heater videos, including those from the 'experts' and this was by far the most thorough, easy to follow, enjoyable and approachable video I've seen. If you're half as careful and thoughtful in the rest of your endeavors, all who know you are lucky indeed.

The dimensions of the Rocket Stove and the sizing of the ducting and the specific materials used, have been researched by many around the world for decades This build is a result of all that accumulated research. Basically the riser of fire brick and the insulation wrapped around it ensure that the unburnt gases from the burn tunnel and excess air (drawn in by the exact sizing of everything) make sure ALL the gases are burnt, so there is no creosote at all (well perhaps in the first minutes until up to temp). The fire brick in the burn tunnel also helps with keeping it HOT and the 90deg bend to riser further helps with mixing. Its called a rocket stove because of the noise it makes as the air and wood gases mix and burn completely. Most users find no unburnt coals, minimum ash and very little to clean out and the riser is normally a grey ashen colour indicating complete combustion. What you saw when he lifted the barrel early on in the build was black soot from the small "drying fires", this changes when it gets a full burn going as after 5minutes there is NO smoke just a heat haze coming out of chimney. The reason fire brick is used is because of the high temperatures generated in the riser that can destroy steel and even stainless steel in a few burns (many have tried and failed with steel in these RS's). Temperatures over 1000degC 1800degF are generated at peak burn. Rocket stoves are burnt clean with an excess of air, at high temperatures = total combustion for short periods of time and the massive amount of heat is absorbed in the cob bench which then releases it over the next 6-12 hours. Cob has a heat penetration rate of about 1inch per hour so the bench takes time for heat to reach surface but then stays hot for a long time. Many just have ONE 1/2hr burn 1 or 2 burns PER 24 hours for ALL DAY & NIGHT HEATING = very comfortable house. Because of the efficiency of these fires most users report using 1/3 to 1/10th of the wood previously used in a steel box stove,. Decades of research by many around the world in open forums. This build is a result of all that accumulated research and knowledge. The cob lets this stored heat out all night as the heat is stored in the cob and the fire is out and the flue close so it doesn't draught warm air to outside. So no fire at night = maximum safety Most steel box stoves are filled to max and flue turned to minimum in an attempt get heat from full night burn. This is what creates the creosote AND an unattended fire at night plus creosote is NOT AS SAFE AS NO FIRE I would imagine he will wall in that area in the future and have a lovely cosy place in winter Manifold/bell when the extremely hot fully burnt gases from the riser hit the bell they spread out in all directions and hit the side walls. In doing so the loose some heat, now being cooler they are more dense so start dropping down sides where they loose more heat etc etc until they get to the bottom they then flow into the flue that runs through the bench giving up even more heat until they are pushed out of the chimney as "relatively" cool waste gas. Mainly Co2 and water as we have complete combustion due to excess air and extremely high temps. These high temperatures in the insulated Riser, mean the gas has expanded hugely causing high velocities (rocket stove noise) this momentum drives the system as the gas cools and therefore shrinks the rest of the journey. The shrinking gas also means the friction with walls becomes less and less as the gas is pushed along. An important part of the design is to not make the bench too long a take out too much heat or the water vapour will condense so exit temps of 50-100deg C are part of the design. There are tables of design parameters in the Rocket stove Forums for Rocket stoves from 1kw output at 3" or75mm to 17kw 250mm or 10" Riser/flue diameter Manifold/bell when the extremely hot fully burnt gases from the riser hit the bell they spread out in all directions and hit the side walls. In doing so the loose some heat, now being cooler they are more dense so start dropping down sides where they loose more heat etc etc until they get to the bottom they then flow into the flue that runs through the bench giving up even more heat until they are pushed out of the chimney as "relatively" cool waste gas. Mainly Co2 and water as we have complete combustion due to excess air and extremely high temps. These high temperatures in the insulated Riser, mean the gas has expanded hugely causing high velocities (rocket stove noise) this momentum drives the system as the gas cools and therefore shrinks the rest of the journey. The shrinking gas also means the friction with walls becomes less and less as the gas is pushed along. An important part of the design is to not make the bench too long a take out too much heat or the water vapour will condense so exit temps of 50-100deg C are part of the design. There are tables of design parameters in the Rocket stove Forums for Rocket stoves from 1kw output at 3" or75mm to 17kw monsters of 250mm or 10" Riser/flue diameter

What a gift to your family. Thank you for conveying all the education you went through to do this, to us. ❤

I'm 2:45 into the video, and I can already confidently say that this is the best-explained rocket mass heater build I've ever seen. Thanks for the work you've done explaining this-- I might have one of these in my living room next winter thanks to your help.

I've done everything you asked me to do in your viedio. As retired mutli industrial tradesman in Michigan, I admire not only your ability of workmanship but also your ability to teach. Keep on doing what you're doing. God bless you and your family.

This is probably the best video on rocket mass heaters I've ever seen. It's clear, informative, concise, and shows absolutely everything you'd need to know in a step by step format which is so useful.

If there were prizes to be given out, this video would win the one for the best way of explaining a build category imo. Excellent.

Great build, and video. Nice to see a RMH that doesn't look like someone's cat coughed it up. Keep offering such quality content and you'll hit 1,000/4,000 in no time.

One of the most detailed, beautiful rocket stove builds I've seen in a long time on youtube. Thanks so much for taking the time to share with us.

I really enjoyed watching you build this stove. The fact that you did all this in your spare time is amazing. Your passion shows through in all that you do. The building, the video production, your explanation as you go through the process, your attention to detail, your patience with your daughter, all of these things are a testimony to your abilities as a man, a husband and father. I am an Anglican priest and a psychotherapist. I deal with people on several different levels and with issues both spiritual and psychological and I want to tell you that you are a blessing to more people in more ways than I hope you can imagine. May God bless and keep you and yours.

Literally, the nicest pile of dirt I have ever seen

This is one of the best videos I've ever watched as far as quality goes. Clear, concise, and thorough instructions without a lot of extraneous talking. All camera angles were perfectly matched to each step or feature of construction. I'm wondering if you're going to enclose that patio in the future? If not, I could still imagine sitting on that warm bench on a still & quiet winter evening with snow on the ground, sipping a hot drink. :) Thumbs up and subbed!

“There is no such thing as a new idea. It is impossible. We simply take a lot of old ideas and put them into a sort of mental kaleidoscope. We give them a turn and they make new and curious combinations. We keep on turning and making new combinations indefinitely; but they are the same old pieces of colored glass that have been in use through all the ages.” Mark Twain Brilliant job explaining and making this rocket stove.

Looks awesome. These kind of stoves are very popular in Finland. Tulikivi is one producer. I have one too. The big advantage is, that heat is emitted via infrared radiation, which feels nice and is mkre efficient for heating than convective heating of a metal stove with few mass. I also have a chimney with air intake. So the exhaust gas preheats the incoming outdoor air. Making the burn more efficient by not pulling out the indoor air. Also it is more safe as the air intake acts as an insulator for the exhaust pipe.

This is the best step by step of building a RMH that I have seen - free and paid for. Looking forward to viewing your other work. Subscribed. 🙂

I like how you explain things as you go along, and the camera is showing things long enough to actually see what is going on. The slow-motion trowel made me laugh 😂 And the wind chimes are nice ☺️

Stumbled upon ur channel watching homesteading video. Ur calm voice and informative videos r awesome. Love the content.

I just found this channel this weekend in the wake of all the chaos. I’m so thankful for all your work and sharing. I hit all the buttons and subscribed. You are an absolute blessing. Thank you. Ecclesiastes 11:9 Proverbs chapter 3.

Of all the how to videos I have watched, this one was by far the best detailed production I have ever seen! I feel like I could just go out there and do it myself. Bravo sir. 1

I definitely appreciate how you showed the entire cobbing process on making the seat. It illustrates the patience required for making this project instead of a "and tada!" moment.

Thank your wife and daughter on our behalf for your efforts to show us this !!! Excellent!!

Just beautiful! Everything is perfectly done. I would ad two things to this awesome build: - opening under/side the wood entering pit for easy access in order to clean the ashes - iron or clay or rock plate on the very top of the barrel in order to keep stuff hot ( food, tea, coffee or something different) Everything else just motivates me to do the similar stove! Thank you so much for this great job !!! 👏

And then we all discover it's one of those cakes/pastries that resembles stuff. Bravo! Definitely one of the best construct videos. Award winning dialogue in itself. This is how the Tartarians must have done it. Imagine on a LARGER scale. I mean, you did mention giants.

This was without doubt the highest quality video I've seen on rocket mass heater construction. And cob. Well worth my subscription and all the other things. Now I'm looking forward to watching your other videos. Great camera work, clear speech, good instructions, beautiful aesthetics... you even answered my question about the holes before I could ask. Really outstanding work!

At first I thought I would skip to the end of the video, but the whole build was very entertaining/ educational. Thank you for your great explanations. Subscribed

Nice job ,👍 nice family !!! That's how we truly start making America Great again. Supporting our brothers like yourself "That getter Done" !!

Well done. Not many are willing to put out that much effort into a project. I hope it serves you well.

I have *some* experience with woodstoves, fireplaces, chimneys, flues, weathercaps, masonry, plastering, and various applications of mortar & cement . . . What I admire most is the well rounded perspective offered to anyone who knows essentially nothing about such a project and the guidance provided to increase the likely hood of such a person's success. Combustion exhaust completeness is an issue in many municipalities -- I suggest that some reading on catalytic devices to reduce unburned byproducts is advisable.

Not only did you clearly explain and show each step of the process, but I appreciate that you also show how long the process takes and what tools are required if you are just working in your spare time. I know I eventually want to build a rocket-mass heater inside, and I think this is probably the pace I would go, so I too should plan for about 6 months. Thanks for all the helpful tips and insights!

Impressive! I'm 57 yrs old. Served in the U.S. Navy, then served in the Tennessee National guard. Did many various types of work throughout this Nation. Yet after watching this video, I feel as if I have never put that much effort into anything. Or for that matter, all of my life combined lol. That certainly was a job man. You are a beast.

I like it all!!!

I have watched and read many instructions on the build process, but yours is the most detailed and great to watch.

By far one of the best videos/projects on the internet! Thank you very much for sharing!

Fabulous. So detailed anyone could follow and be successful. While managing an organic farm, we built a rocket mass heater in a high tunnel so we could start 32,000 hot pepper plants. It was not as pretty as yours. Great job with each step and filming.

You are great at explaining this. It's very clear at every single step. Awesome video!

Considering you released this video 3 weeks ago and now have 14k subs, if you keep making content of this quality, you will go viral. 3-5 years for a million subs easy. Just make sure you keep that family ballance going. Best of luck to you :)

Dude, this is one of the best "tutorial" videos on anything I've ever seen. Thorough, concise, but very important and necessary depth. Thank you!

You're not crazy you're a genius.

This was a fantastic video, I enjoyed every second. Just to clarify, your daughter wasn’t playing with the straw, she was doing QC to make sure it was the right consistency 😂. Nice touch with the etching of the clean out caps!

Awesome build. Very good explanation of the entire process. Something to be proud of. Cheers I look forward to seeing more adventures.

'To close for missiles, switching to guns'... lol nice. Wow... this is the best DIY video I have seen on UKposts. Very informative without being boring & slow, shows and explains all the details in concise commentary and footage. Very very well done sir.... thank you!

I like the way you ‘perforated’ each course of cob to adhere to the following layer. Nicely done.

no doubt this is the best home made earthern rocket furnace build on youtube.. thank you. liked and subscribed!

Excellent video! As others have noted, I've watched a lot of RMH vids over the years and this one really brings together the science and practical aspects in a very clear and understandable way. Def. one to bookmark and refer to later.

of course I appreciate the detail and instruction on this build video. It is high quality and of tremendous value. However, I just noticed the absolute BEST feature of this video (only because too many videos are ruined by this). It is the BACKGROUND music. WOW! Soothing, calm, a respectable volume and does not distract or take away from the impact you are working hard to present. WELL DONE.

Why can't all DIY videos be this well produced? Fantastic work and unlike many videos I've seen on this subject, you've answered every question and in an easy to understand way. Thank you! Subscribed and 👍

A lot of work, well done. I really enjoyed your video and the final stove looks great.

Really well done mate. Thanks for taking the time to share this.

Incredibly well done! Very informative!

Thank you for your time, filming and for sharing. You've done some absolutely incredible project

I did not expect to spend my Saturdays last hours watching a man build an earthen mass rocket stove but i don't regret one minute of it, great quality and you have a wonderful personality ans glad to see you've rocketed your subsribers well past the limit, doing the same still 👍

Great job! Looks ĝood too. I saw one built about 20 years ago and found it interesting. The family sat and laid on theirs all the time. Your explanations were right on.

Thank you very much for sharing your hard work!

I have seen a dozen or so RMH construction videos, and your video is the clearest, most straightforward video I've seen yet. Thank you for this. This is my new 'gold standard' how-to video. Well done.

Nice to see you attained more than a thousand subscribers. Congratulations! It is lovely when your family pitches in and helps. I thought that was a sweet gesture to leave in that clip. I often thought of making a bed like that but I never got around to it, because I never had my own place. The insert was a clever invention, too.

Beautiful, meticulous work. I appreciated all the detail and super explanations. You are a real inspiration

This is fantastic, wish I had seen this 30 yrs ago when I could have made this, too old now. Dude you are great.

By far the best video that I've ever seen of building a rocket mass heater and I've been watching these types of videos for over a decade. Well done lad!

Hard to convey how unheard of it is for me to watch an hour and fifteen minute video of anything and I just did it of some dude building a rocket stove. Much thanks and props to you for not just a cool project but also of a well done video. Nice music choice as well! So often decent videos are ruined with bad music and this was not the case here. Subtle and well-chosen.

Thanks for making this content brother! Your mind is a blessing to all of us.

Very patient, insightful instruction - thank you.

I’ve watched a lot of rocket stove, build videos over the years and this is by far the best. Appreciate your time. Documenting the details. Great looking stove.

Just got here from a UKposts suggestion and threw you a like and subscription. I'm a Permie and have admired Erica and Ernie's work for many years.

One, or maybe , the best video about the rocketstove I've seen. Thank you!!!

One of the most complete descriptions I've ever seen on how to build something. It's like backstage at This Old House, awesome! I learned a ton from you, love what you are doing and how well explained it all is. And your music is kickass on the time lapse scenes!

Your transparency and explanations on this has just been high quality! Just you sharing this knowledge and sharing consciousness on this topic im sure the world will slowly start to become a better place. A million times thank you!

A beautiful, masterful job! As the other commenters have said you have made a truly educational video of the process. This is one of the projects on my bucket list. Thank you!

Thank you for your knowledge!😊

Your time lapse is amazing!!! I loved you're video!! very Impressed!! You are a wonderful person!!

You sir are an artist, thank you for teaching us how to do it the right way.

Damn i'm a pretty young dude but that build and all the details you shared with us really passionated me. Thank you for all that crazy work keep it up man !

My husband and I watched and enjoyed it .. Thank you

You said, "hit subscribe!" in the absolute politest and most well mannered way to where I was actually happy to do so. Thanks for your video's, they're amazing.

You have impeccable craftsmanship, and I appreciate your editing style too. Really great work!

Such good work accompanied by great explanations. Thanks for maintaining a good video record throughout the whole build! Appreciate ya.

Wow, this is just what I needed. I'm planning a small off grid passive solar home and need a plan for back up heat. I think this is it! Thank you for your time and energy in putting together this tutorial.

You are really an inspiration. I am so glad you video taped this. Thank You!

I have no idea why this popped up in my feed probably related to alternative living, but I can safely say that this is so well made and really educational! I watched all of it and I don't normally watch hour plus videos. You have easily passed that 1k goal you set in the video and I have subbed to stay connected with you as just wow!!! I love the layers of the clay before you put the finishing layer on!!! This bench is honestly so impressive. Also I love the cob it just looks so lovely!! Here in England Cobb isn't really used as it's just a faff and isn't very waterproof being England lol

This is by far the best RMH tutorial I have ever seen on yt. I watched the whole process without even skipping one second. Definitely saving the video for future reference. Great work.

I enjoyed the video, and hopefully the algorithm enjoyed my comment.

thank you for the great thorough and serene tutorial

I remember being fascinated learning about heated Korean floors, and spending days thinking about how one would implement different, more efficient versions of it in fictional and real-life settings, using rocket engine concepts, etc. I found this video today and was absolutely mesmerized by the concept, explanation, and execution. I think this is the closest I’ve ever gotten to literally dreaming about something and actually finding out it could be reality. I hope I get the chance to implement this one day. Thank you for all the time, effort, and love you put into this. congrats on the 11k subs as well. I’m glad to be one of them! (how’s the ash disposal on this btw? perhaps its not that big of a hassle just scooping it out? would a liftable bucket of sorts be a viable quality of life addition?)

That's basically how a lot of traditional ovens work in cold countries. In Germany, Austria and Switzerland you have the kachelofen- in Sweden, Norway and Russia you have the same concept but built through your whole house (even bigger heat sink) very fascinating topic! My friend has a very special oven which when closed builds up a low pressure zone but it needs very little fuel and heats a long time- just don't open the door to the fuel chamber it will implode😂

I have been watching builds for these stoves for over 30 years. This is by far the best I have seen.

Great video! Thank you. The design is super as is the clear pleasant explanations!!!

Great job! The heater looks wonderful and your video production is very informative and entertaining to watch. I look forward to seeing more projects

The good thing about putting the dimples in it is that it will help the drying process as well. And you should be happy that you didn't do the entire bench at one go because it would take forever for the inside to dry. You are better to do it in 6 inch layers with time to dry between.

Insanely good job on both the project and the video! One of the most appealing things to me of a stove like this is the heat output and efficiency of that heat with a tiny amount of wood used by comparison to most wood stoves you see. Thank you for posting this

Thanks for including all the steps. Useful video.

Nice work, great explinations, good camera placement, nice editing. Overall excellent production. 👌