Barrel stove made out of 3 55 gallon steel drums. Stove is very efficient. The burner barrel is lined with fire brick and comes with wood rack. Middle barrel has a 10 inch tube down the center to maximize heat transfer. Has factory made door with airflow control. Also has factory made legs. When the bottom barrel is burning red hot the top one can still be touched. Add a fan to the rear and blow the heat where you need it. I have had it red hot before and the top barrel still has the paint on it.