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THE BOOK I USED: "The Rocket Mass Heater Builder's Guide: Complete StepbyStep Construction, Maintenance and Troubleshooting". By Erica Wisner (Author), Ernie Wisner

Amazon Affiliate link is here: https://amzn.to/493YrsO
As an Amzon Affiliate I am eligible for financial incentives if you buy the above book.
I built this Rocket Mass Heater on my back porch. It is one of the most efficient wood burning heaters known to humans.

Timelapse version of this project here:    • Rocket Mass Heater. 6 months in 6 min...  

If you have read this far it means you are intrigued. THAT means you should click the "subscribe" button to my channel so that youtube will be more likely to alert you of the crazy projects I build in the future..... or the crazy ones I've already built.

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I am standing on the shoulders of giants. If you want to learn more about these types of stoves you can talk to the giants at: https://permies.com/forums
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Building Materials (A modified list contained in the book; The Rocket Mass Heater Builder's Guide). Buy their book if you plan to build this stove. I get no money to say that. I want people to be safe though and that book is a fairly comprehensive guide to a safe build in my opinion.

Masonry:
• Firebrick (9" by 4.5" by 2.5") and halffirebrick (9" by 4.5" by 1.25") • Rubble (broken concrete, local fieldstone, or brick, for footings and face)
• Mortars: Clay slip (or thinset refractory mortar)*

Earthen Masonry:
• Clay (recycled pottery clay, raw fireclay, or local clay soils) • Aggregates: masonry sand or traction sand, plus small gravel (%"minus/pit run) . Road base was used for my project.
• Straw and fiber for outer casings

• Insulation: Perlite base, DuraBlanket (ceramic fiber/rock wool rated for over 2000°F)

Metal :
•55 gallon drums: two matched steel drums in good condition, clean of paint and debris
• Matching steel barrel lids and bandclamps (foodgrade barrels often come with clampon lids)
• 8" ID stovepipe (or ducting) for channels in the following shapes:
4 elbows. I used more than the book calls for because I used HVAC duct as the chimney also. This is not an ideal setup so you should probably spend the money on actual chimney tube ESPECIALLY if your stove is indoors.
3 capped Ts for cleanouts (eachT needs one matching closure cap — preferably uncrimped stovepipe caps that fit over the pipe, not into it)
2 straight 5' pieces and 3 straight 2' pieces (or approx. 16 feet total straight pieces)
• 8" ID chimney (measured to fit the structure — dimensions will vary from project to project):
stovepipe/manufactured chimney long enough to reach from bench to ceiling
insulated class A chimney sections from ceiling through roof
matching throughroof fittings including screened chimney cap

Bits and Pieces:
• Braided woodstove gasket — approx. 7 feet for each joint (14 feet to make both lid and whole barrel removable for maintenance access)
• Foil tape and/or sheet metal screws for duct joints
• Masking tape and masking materials to mark levels and protect nearby walls/floors
• Framing materials (scrap lumber, screws and driver, saw) for floor and roof work
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I recommend anyone watching this video or reading this description perform significant research on their own prior to attempting to build any stoves. Please seek that advice of experts as what is in this video is NOT formal advice. As I said in the video, there is risk of death or injury when working with fire or stoves. Several comments have asked me if creosote accumulates inside the stove and I cannot with any certainty answer any questions related to this as I have only had this particular stove for several months and as I understand; creosote takes time to accumulate. Please know that if you embark on building a stove that you are doing so at your own risk. I cannot be held liable as I am NOT recommending you repeat what I have done.

The information provided in this video does not, and is not intended to, constitute construction advice for any stove (woodburning or otherwise). The information, content, and materials available in this video are for general informational purposes only. Information in this video may not constitute the most uptodate information in regards to building codes, or laws. This description and some comments in the comments section refer to other thirdparty websites and books. Any such links or references are only for the convenience of the viewer/reader. I do not recommend or endorse the content of any third party sites or references.