Rocket stove bum warmer

[TREETOP]

Seen this and thought it might be of interest to some of you lot
Looks like a great idea to me. what do you think?

http://www.richsoil.com/rocket-stove-mass-heater.jsp

[drliamski]

This is a great idea.

What about these, anyone used one?

http://www.envirogadget.com/energy-s...t-wood-burner/

I just bought one, there great!

[ged]

It doesn't matter how you dress it up, there's still no such thing as a free lunch.

[drliamski]

Not sure what you mean?

[ScotsSurvival]

I like the mass heater and have seen it before I was thinking you could coil copper pipe in the substrate to heat water as well. A small pump should keep the water moving or it might even work just with convection.