Induced-draft or forced-draft burners increase the efficiency of the furnace as well as help assist the draft of the chimney. This is similar to a bellows fan on coal units. These are highly recommended for use with the Hot Blast furnaces when you are burning coal.
Do I have to use the wall thermostat of this US Stove 11DIKL draft induction kit?
The wall thermostat that comes with the system could be replaced by a simple wall thermostat, but a thermostat would indeed need to be utilized in order for the induction kit to work correctly. If the thermostat is not used, the system would need to be operated on and off manually.