Wood Firing is a demanding process requiring intensive labor in both preparing the wood and firing the kiln. Even a modest size wood kiln consumes a cord of wood. Stoking for 20-30 hours can be an exhausting experience, but the results achieved are worth the effort. Wood kilns are fed smaller diameter pieces of wood. Depending on the stage of the firing, stoking may take place as frequently as every 3 minutes. The potter mast pay constant attention to the kiln from start to finish.