Rocket Mass Heater Resources Wiki

This perrenial document aims to become a hub of comprehensive information pertaining to Rocket Mass Heaters.

Briana Great wrote:Is there a "small" rocket stove design that can be used to efficiently dump a lot of heat, rapidly, into a "typical" living area, for those of us trying to move from 3 to 4 on the Permies Scale?  =)

Briana Great wrote:Hi!  I hope I'm not "crashing" the party, as I am only barely beginning to read about Rocket Mass Heaters.  The problem I have, is I'd love to use Rocket Stove type efficiency as a retrofit for an existing house - one with a foundation that cannot support RMH.  My husband bought me the book without understanding that we cannot utilize any of the designs in our current home.  

Is there a "small" rocket stove design that can be used to efficiently dump a lot of heat, rapidly, into a "typical" living area, for those of us trying to move from 3 to 4 on the Permies Scale?  =)

Kevin Harbin wrote:

Beau Davidson wrote:
Kevin, I believe you're right!

It'll take a while for me to get to that level of detail - if you'd be up for reorganizing a bit, I'd be happy to implement your suggestions!  If not, no worries, we'll get there as we're able!

I've taken a first pass. What's the best way to get it to you? DM? Shared google doc?

thomas rubino wrote:Hi Jordan;
You might like checking out Matt Walkers RMH  it uses a riserless design that can fit in any room. It uses no barrel at all.
Here is his site   https://walkerstoves.com/index.html

thomas rubino wrote:Hey Jordan;
Matt's design can be seen on his website.  The gasses make a 180 degree turn and then pass thru a port similar to a batch box port before starting to rise.
When built using CFB and utilizing an RA330 liner his stoves take right off.
If built using heavy firebrick they take longer to start drafting properly but then will hold heat longer.

His stove uses the same primary air intake and a secondary air tube the same as a Peter Berg batch box.

paul wheaton wrote:I think i have this page now set up with this shortcut


      permies.com/rmh

Tamarlane Ivey wrote:HELP! I am interested in making an RMH, however I can't find where to get the firebrick.  No matter how I frame the question, I literally get EVERY brick under the sun.
Where oh where can I source Firebrick??
Thank you for any help that may find its way to me.

paul wheaton wrote:

Tamarlane Ivey wrote:HELP! I am interested in making an RMH, however I can't find where to get the firebrick.  No matter how I frame the question, I literally get EVERY brick under the sun.
Where oh where can I source Firebrick??
Thank you for any help that may find its way to me.

https://amzn.to/4aT2DMJ

thomas rubino wrote:Firebrick is not all created equal.
I noticed these are  rated to 2200F
They are a vermiculite product.
Last but not least, they are splits not full bricks.

Check here https://refwest.com/browseproducts/CLIPPER-DP-9--64mm-Straight.HTML
Or here https://www.mutualmaterials.com/where-to-buy/
I pay $2.40 per brick for 2500F full-size bricks at Mutual Materials

Tamarlane Ivey wrote:HELP! I am interested in making an RMH, however I can't find where to get the firebrick.  No matter how I frame the question, I literally get EVERY brick under the sun.
Where oh where can I source Firebrick??
Thank you for any help that may find its way to me.

Jordan Beaupré wrote:
Anyway, if anyone knows where to find properly rated bricks in Canada, please reply here. I sure haven't made extensive research but I can say they are not easy to find around here.