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Hottest part of RMH?

 
Posts: 6
Location: Portsmouth Virginia
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If I was going to build a RMH and only place 6 fire bricks and the rest regular bricks, where would be the best placement for the fire bricks?
 
Rocket Scientist
Posts: 1809
Location: Kaslo, BC
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For me it was always at the back base of the heat riser and also the entire roof  of the burn tunnel where the bricks would be spalled the most.
 
I think they should change the spelling to Sandy Eggo. This tiny ad agrees with me.
rocket mass heater risers: materials and design eBook
https://permies.com/w/risers-ebook
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