content: Thank you. Either way works, depends on what I'm intending with it. With cooking I'll feed kindling sized pieces of wood through the bottom hole to build a bed of coals to create a blast of hot air coming through the top and lay a pan/grill on top the chimney, this way cooks more evenly without a large flame burning the food. If I'm firing clay or just sitting out drinking a beer I'll load small split logs straight down through the top which shoots an about 2 foot flame that provides lots of heat and light. The tunnel creates a strong draft forcing in air that makes the thing roar which is cool to observe.