Hi,
I'm really impressed with your heater. It seems much simpler than any masonry stove plans that I've seen and it makes it much more feasible as a DIY project.
I'd just like to know a little more about pouring the cement for the chambers. Can you tell me what product you used and where it might be available? I've only found small tubs of fire cement and it would take fifty or so of those! Did you mix it with sand/gravel? And what's the approximate thickness?
Can you also let me know in which part of the heater you would have installed the slide damper that you mentioned in a later comment? Would closeable vents in the door have the same effect?
Thanks!
