tera singh

I'm planning a sweat lodge and have been looking at these rocket stoves.  Do you think you could build just the fire box out of fire bricks and burn a fire for a while then use the fire bricks instead of lava rocks in the sweat lodge ceremony? 
If it worked you wouldn't have to have a large open fire in your back yard for a couple hours burning lots of wood   Anyone ever poured water on a hot fire brick?

thanks for the feedback

Hello, wondering if one could burn coal in a rocket stove mass heater.  I know coal is not an environmental fuel source.  I am trying to convince an uncle to let me build him a rsmh in his home and he currently uses coal for 70% of his winter fuel.  (we live in carbon county, utah)