Harvia M3 SL WKM3SL Wood Burning Sauna StoveHarvia M3 SL Wood Burning Sauna Stove Through the Wall Heating Experience the warmth and tradition of a wood fired sauna with the Harvia M3 SL wood burning sauna stove. Designed for saunas between 159 to 459 cubic feet, this innovative heater lets you enjoy a cozy steam bath while conveniently feeding the fire from an adjacent room or outdoorsperfect for uninterrupted sauna sessions and easy firewood access. With its through the wall fire chamber, you