In our opinion, a gas appliance is made solely for gas. Moreover, real lump charcoal like ours generates a very high heat and could seriously damage your gas appliance! Secondly, it is mainly a question of air supply, ventilation and material strength. A charcoal appliance is made with two settings: An air inlet and a gas outlet. Plus, it is generally made from thicker steel or ceramic: It is therefore designed for cooking food over charcoal.