Harvia M3 SL Wood Burning Sauna StoveThe Harvia M3 SL is placed in the sauna room and your firewood is loaded into the fire chamber from the other side of the wall. This sauna heater will give your small or medium sauna a great steam. While someone is enjoying the heat in the sauna room another person can be relaxing in the next room while appreciating the glow of the flames behind the cast iron framed glass door. The Harvia M3 SL is perfect for small and medium sized sauna rooms from