You can upgrade a fireplace in DayZ with stones. They increase the server persistence of your cooking appliance since fireplaces have set de-spawn times, resulting in loss of frying pans, cooking pots, and campfire tripods if you’re not careful. Some of the most useful fireplace upgrades include: • Stone rings – You can add them to your fireplace by including eight stones. • Stone ovens – To make a stone oven, add 16 stones to your fireplace or eight stones to your stone ring.