Rocket Stove

I'm not much of an "outdoors" type, but this project on how to build a rocket stove piqued my interest because I recently finished my keg of IPA and will need to brew again in the near(ish) future if I want any more beer and buying Propane is annoying. My trouble is that I frequently need a second pot of water getting hot, or staying hot for some of the silliness I've been working on while brewing. When I try to do large batches of grain I have to take all sorts of steps to ensure I don't waste leftover sugar that is in my grains. My thought is I could build a medium size one of these and use just a little bit of kindling to keep the second pot hot for when I need it.

This project (video below) is for a fairly small and compact version, mine would likely be a bit larger in finished form but the principles of  the design are very similar as you scale up.