For all your Montana Masonry Heater parts (also known as) Rocket Mass heater parts.
Visit me at
dragontechrmh.com Once you go brick you will never go back!
regards, Peter
regards, Peter
Randy Butler wrote:The site for the heater is an old cottage, 1.5 story, very little insulation, about 1200sf and open to cathedral ceiling.
I have no plans for winter usage (pipes are drained and the place is unoccupied during the cold spell), but I
do want to extend from mere summer use to three seasons.
Randy Butler wrote:The design has the firebox in the cellar with the bell extending through the floor and up into the center of the open space living area.
It allows me to have the actual firebox at a very comfortable loading level, and keep the bark and wood chips mess out of the travelled path.
I will be burning 80 to 90% red spruce - that's what grows all around us, so I figured that an 8 (which seems to have anecdotal evidence to be
the best behaved and most forgiving) would be my best bet.
regards, Peter
Randy Butler wrote:For the last two summers, we have been living with a small (Little Moe All Nighter) woodstove - in the cellar.
No where near big enough to heat the upstairs, but with 13" thick ICF cellar walls, nearly all the heat hangs under the wooden floor.
Not exactly a "radiant heat" floor, but it did make the place very livable. So heating the unoccupied area is not a "make or break" deal.
Randy Butler wrote:The open space in the main living space is largely kitchen and living room. And the bell will emerge between the two.
BUT - I need to keep the height below 4 feet, or the brickwork will eliminate the line of sight between the areas (wife says "no").
So while I can make a wider bell, or add a bench seat for more radiant exposure, I am limited on elevation.
Randy Butler wrote:On the 7 vs 8 inch device, can I not run an RMH at less than full load capacity?
Is it less efficient, or just more costly to build the larger size?
I have plenty of K26 Insulating Fire Brick, and so far, nearly all the red brick has been free for the taking.
What is the disadvantage of having a larger heater?
regards, Peter
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