KLAFS ABC of well-being
A jet of steam provides a sudden increase to the level of humidity in the sauna. Jets of steam rise when water is poured over the hot stones on the sauna heater, and are an additional heat stimulus. Nowadays, jets of steam can also be incorporated into steam baths. This is done mechanically via a nozzle in the ceiling. A jet of air forces the hot steam which has accumulated under the ceiling back down onto the bather. The sensation is much the same as when water is poured over the stones in the sauna.