Fireproof stone can also be called a refractory brick is one of the materials that can withstand fire that is used to hold heat in a combustion chamber so that the heat generated does not come out of the room.
Fireproof stones aside from being able to withstand heat, these refractory stones also hold heat so the room can still be hot even though the heat source is gone. Because fire-resistant stones can deliver and retain heat, it is very necessary to have additional insulation material that will withstand heat so as not to spread to the outer walls of the combustion chamber.
