So I bought a wreck of a house for very little money, after promising myself I would never do this again. It was remote and so cheap.. sucker.!!! There is no heat, but there is five acres of wood. I have working hydro to the property, water by the bucket and composting toilet.
I need heat and want to build a Batch Box, been following RMH ( forums youtube etc ) for couple of years and feel confident in my ability to build one. My problem is the best position for the heater is a floor area of about 7ft x 6ft, so I started to look at Dragon style heaters, then one night about a week ago while mooching on youtube I came across a guy that had built a BBRMH on a small foot print, and the heat conduit instead of metal was made up of using concrete blocks using just one of the cavities,, the other was blocked off and filled I think, he angle cut the block for the corners and cut holes in them to go up a level, ending in a vent to a chimney...nice idea I thought, so like a fool I didnt book mark it and a week later cant find it anywhere. I would like to do the same and make it into a tower about 8ft high covering the block with cob as a finish. Does any body recognise the build I described and do you think such a structure could work? I would love some advice
Enrico, I think I know the video you are talking about. That was a very tiny system. I think if you want to heat your house, you might want to go bigger.
You can make your vent out of block like that, but you want to keep the concrete insulated from the hottest gasses nearest the combustion zone, as concrete degrades quickly when exposed to too much heat. I'll be building a bench style stratification bell out of concrete block, patio pavers, chunks of old sandstone sidewalk slab and cob to seal it all up. This 8 inch system I'm planning is said to be a great deal more forgiving than the smaller 4 inch and 6 inch systems. I know the denser the heat storage medium, the longer it will hold on to the heat as it disperses it.
Seriously Rick? Seriously? You might as well just read this tiny ad:
A rocket mass heater heats your home with one tenth the wood of a conventional wood stove