GrenHeat Bricks are wood and may be used like firewood. they start easily if stacked with airspace between the bricks or in a “teepee” around a few wads of newspaper. The heat form the newspaper gets trapped in the top of the “teepee” to ignite the wood; within a few minutes all the bricks are started from the inside. Add more GrenHeat Bricks as with firewood. It will be very difficult to light only one brick in your fireplace or stove without any additional wood or paper.