Using a Chiminea Indoors Chiminesas can add heat and ambiance to a backyard. It can also be used for cooking and is more secure than an open fire pit. Clay Chimineas require a layer sand in the base to protect them from thermal cracking due to sudden changes in temperature. https://stoves-uk02234.bcbloggers.com/29381079/17-signs-to-know-if-you-work-with-chiminea-fire-pit