The document discusses three types of indirect heating putas - Bhanda Puta, Valuka Puta, and Bhudhara Puta. Bhanda Puta involves placing the drug-filled crucible inside an earthen pitcher half-filled with husk as fuel. Valuka Puta uses sand as the fuel inside the pitcher. Bhudhara Puta entails burying the crucible under ground and filling the area with sand, applying heat via cow dung cakes. The selection of puta depends on the hardness of the drug, with softer substances using putas with lower heat intensity.