The wood used to equip a sauna is heated up to extremely high temperatures typical for a sauna from 60 to 1000C but will not burn the bathers. A stone dish placed above a fireplace is filled with water, which helps to control humidity. At the same time, the air should remain dry so that sweat can always evaporate. Sweating is accompanied by cooling, which ensures the skin does not become too hot. A sauna is thus a bath with the use of various contrasting methods: heating up in a hot and dry air in the sauna cabin and cooling down with cold and fresh air or cold water. This type of a sauna allows steam sessions, during which a sauna host pours water with essential oils on the stones placed on a stove, which creates a heat wave effect.