Developed PRBs have been successfully demonstrated at 15 user places. About 8 Biogas cookstove with Porous Free Flame Burner (PFFB) and 7 Biogas cook-stove with Porous Radiant Burner (PRB) were demonstrated and feedbacks were collected from the users. 25 units have been sold so far. The project has been completed under BIRAC Innovation Challenge-SoCH program