I want to built a rocket mass heater, in my exiting house with a 25-30 ft chimney. I want to use the portable rocket mass heater style design with wood sand and gravel. I want to place it on top of an existing floor. The floor has no way to get under it. No basement, no crawl space. I would make sure the thing does not exceed 2,000lb or something like that which should be possible if I don't fill in the center of my bench with gravel & sand I think i'll be ok.
The stove I want to build has 90 degree angles as described.
5 ft. (horizontal square bench.)
5 ft. (horizontal square bench)
6 ft. (horizontal square bench)
6 ft. (vert) Going up. along side outside of chimney.
1 ft 90 degree joint inside.
24 ft to top of chimney.
Attached PIC: want to put the the barrel to the right of the chimney, and build a brick wall handle the heat, where existing sheet rock it, and put the bench basically where I put the sofa in the center of the room, and then put the exuast up the left side of the chimney before entering the chimney about 6ft up.
Note: I have not lined the chimney yet, but from what I hear flex tube is not a good idea, so I'll try to find the cheapest decent way to line it. It's just brick now.
Some Questions I have:
How much does code matter? I live in NY. Own my own house. I'v been looking at this forum an seeing that that RMH's are not covered under code. Now how much should I care about that? Does it only make a differences when I try to sell the house or should I care while I live in it? It is a nice house so id like to have it covered if my RMH goes wild and burns my house down. When it comes to code is it like: what the city doesn't know wont hurt them? or do you need to get every device you add you your house, specifically inspected and insured?
What would work better for this length of a system: 8" or 6"?
Size of barrel. 30 gallon drums are nice and compact, id rather use one over a 55 gallon drum. Is there there anything wrong with using a smaller barrel, on a system of this size?
If code is really important i'll go for this cheap masonry heater build
But my guess is one to make the heater, give it a second 2nd skin that looks good in a colonial, make it code worthy, and poor a footing, and line 25ft of my chimney (no idea what that costs) i'm looking at $2,500 total i'm guessing).
If all else fails ill throw in a wood stove with flex pipe, and call it a day.
Any tips or guidance you might have, I thought I would bring it forth to those who have gone before, before doing something dumb, on my own.