Notice the angled sides of this style of fireplace. They reflect the heat from the sides of the fire into the room. This is a hot fire to make a nice bed of cooking coals in the Hibachi, which you can just see under the firewood. Look closely. The burning split wood is leaning against the top grate of the Hibachi, which is opened toward the back. This preheats the grate and protects the ordinary brick back of the fire place from the intense heat. When the logs have died down, I will use fire place tongs to rest them along the length of the Hibachi, and set the grate in place for cooking.