A armstrong furnace burner parts burns a fuel to produce heat. The heat is then transferred to the air or water that flows through the furnace, which is used to heat a building or industrial facility.Burners typically have adjustable settings that allow the user to control the amount of fuel that is burned, which can affect the furnace's efficiency and the amount of heat produced. Some burners also have automatic controls that can adjust the fuel flow based on the temperature of the air or water flowing through the furnace.