A soot blower is a system for removing the soot that is deposited on the furnace tubes of a boiler during combustion. Types of soot blowers: 1 Wall Blower. 2 Long Retractable Soot Blower (LRSB) 3 Air Heater Blower. Steam blowing medium: · Steam · Air Steam is normally used as a medium for blowing away the soot since capital cost of steam pressure reducing equipment and drain is less than the cost of compressors, motors and control of air systems.