The Gas Stove is a historical item which can be found by Freddie in Douaumont Fort during Chapter 2.
Location[]
Head back to the corridor and enter the next room on the right, knock out the soldier then search the locker for this item.
Description[]
"A gas stove for warming food or heating a room. Not always the most practical heating appliance to use when trying to heat a ftarnethrower fuel depot."