Hi Permies! I've got another plan set finished up in time for the holidays for you! I'm excited to introduce the Walker Brick Rocket Mass Heater!
I've been having a lot of fun interacting with you all as you are building your Walker Ceramic Fiber J cores and Cook Stoves, and one of the most common interactions is folks asking for plans to build a Rocket Mass Heater using the 6" Super Hot J Core Plan. It's such an easy way to build a core, I thought I'd try to simplify the rest of the process as well.
I've designed a Brick Rocket Mass Heater that can be built by anyone using simple brick stacking and a safe clay/sand mortar. The core is simple parts cut with a knife or saw from ceramic fiber board. The brick work can be done with no brick cutting and very little fuss. It requires about 225 bricks, ceramic fiber board, and some stone or concrete slabs/pavers for bench and bell tops. A simple build that a rookie can build in an easy weekend, this one is for all of you folks who want an RMH but don't care for the barrel, or have a small space. It's ideal for a small cabin, living room, greenhouse, shed, etc.
I've put the plans on sale through the weekend, there is a link to my site below for more info.
Let me know how I can help you build your heater, and thank you as always for letting me share here. Thank you Permies!
Congratulations Matt ! You've done it again. If you keep popping up with these really cool plans , nobody will design & build their own anymore .... they will just buy and build yours ! Keep up the good work!
For all your Rocket Mass heater parts.
Visit me at
Hey gang, I know I just posted a customer build yesterday, but I got another email today and I know you all are as excited to see new RMHs as I am, so I thought I'd share. It seems there are lots of builds wrapping up as we approach winter and I am having so much fun helping you all with your builds and seeing them come to life.
Check out this great example of the Walker Stoves Brick RMH by Joshua Heyneke:
I'm really impressed with your work and am strongly considering buying plans from you. One preliminary though: are your brick stoves and rmhs light enough to install on a standard joist-supported floor (18" centers) or would they require some floor reinforcement or a dedicated foundation? I gather the latter is standard for cob rmhs but is something I'd like to avoid.
all the best,
Hi Matt. We’re planning to purchase your rocket mass heater plans, but we have a couple questions. What’s the difference as far as the amount wood used in the batch heater and the brick heater? Also, we need it to heat 2,000 sq ft, so do we modify it in some way or how do we accomplish that? Thanks!
If you use fireclay mortar, the bricks will come apart cleanly and be easily reusable. This does not meet code which requires refractory mortar, but may be practical if that does not concern you.
Heating 2000 square feet may be a challenge for any single heater that does not use remote heat transport, depending very much on the house layout; and the size of heater required depends very much on your local climate as well as the house size.
A cob or brick bench style of bell may be able to be supported on ordinary wood framing, depending on the specific details, but a concentrated tall bell will most likely require reinforcement or a dedicated foundation.
In Michigan (= gets cold and stays cold) I might consider making one of them an 8" version, depending again on layout and positioning of the heaters. If it turns out to be more than needed, no problem, just burn for shorter periods each day; if 6" is inadequate, you might need to burn all day, which could be a real pain. 2000 square feet is not a "small house" which is what this particular plan is aimed at.
I might also consider building one 8" system in a central location, with provisional plans to build a supplemental 6" version in the coldest peripheral area if the first is not sufficient.
Lookout! Runaway whale! Hide behind this tiny ad:
Morgan Superwool Plus non-ceramic fiber blanket for Rocket Mass Heaters