The appts. comprises a common temp. fusible protector and temp. sensor arranged on a wall above the stove (3). A second temp. sensor (7) for the determination of the actual temp. is arranged at such a place in the sauna room (1), by which the desired temp. should be set. The second sensor (7) is positioned above an upper bench (6), and electrically interconnected with the first sensor (5). The two temp. sensors are electrically connected with a cascade regulating circuit in the central unit (9), and pref. the stove is controlled from a microprocessor.
